sounds like you "grey out" literally losing 90% of your memory of time, you need help, you need to never play again, your brain is being hijacked, sounds like you only have one choice, and you need to start now....best to you

I experienced "brown-outs", as my counselor called them, for the last 5-8 years of my out of control gambling. Yes, I too had low energy most of the time and high energy when gambling. Gambling was the only times I could get the dopamine levels up to where they made me feel good and full of energy. (Doing it for three days w/o sleep -easy.) It begins to fade the minute the gambling stops. (Perhaps why I would not stop until every cent I could lay hands on was gone.) Brownouts are a pretty sure sign that you have crossed the line from "social" gambler to "compulsive" gambler. (There is no going back to social gambler, I'm sorry to say.)
The brownout, is basically your brain on massive doses of dopamine - Time went fast - nothing else was important except slamming that money in the machine. I would not remember how many times I went to my ATM and would keep going there until it would not give any more money. I was like in a dream, daze or Disneyland where nothing mattered. We are, in the most basic sense, drug addicts, only the drug is manufactured in our own bodies.
Never the less, while, it is a "natural" drug it is no less harmful than heroin/meth or any other newfangled harmful drug. All addictions hijack this system that is part of our primal, reptilian brain system of dopamine/seratonin. That system is designed to help us remember where good food, shelter, water and chance to procreate are located. Our embedded blueprints for survival is also part of the addiction mechanism.
Three months is an interesting amount of abstinence because it takes 90-120 days, accounting to my counselor, of not gambling (and not watching someone else gamble and not doing other addictive things) to get dopamine levels back to normal.
I am pretty sure now that I have 3+years that the lack of energy at other times was partly due to how much energy I expended while gambling. Now I am only tired at night, every night unless I am sick.
I hope this was helpful to you and that you will get away from this dreaded disease forever, this time.

A good three months of abstinence, then bam! So what you do is begin again. One day at a time. We may never know why our addiction is capable of changing so much in our life’s. I suffer from R/A, it amazed me and still amazes me, that I could ignore my pain without caring what it was doing to me then or in the long run. The damage to us psychologically is far worse than physically. But.... we can fight back, it’s an addiction of the mind, our minds, and we can slowly begin to change the way we think and feel. First things first, no gambling. Get three more months, because you know you can. Keep coming back here, we’re all here for each other.
Today I will not gamble

Thank you for all of the kind and thoughtful responses. I am not going to gamble today.

I am thankful for a community that understands this struggle.

All too familiar. Losing all track of time, kidding myself that I was having fun, absolutely convinced that two-day binges were just harmless escape from my exhausting job...I imagine many of us know the drill. That level of frenzy feels so good in the moment - the dopamine is that powerful - but when I'm honest, I know the consequences are dire. From things I've read, it seems 90 days is a fairly common time for urges to strike with a vengeance, and I'm sorry they got you. I'm still coming to terms with the fact I have a lifetime of vigilance ahead, and that I have to work every day towards true recovery, not just staying abstinent. Self-banning has been key for me. I resisted the idea for a long time, but now I wish I'd done it years ago. Taking that option out of the picture makes everything else easier. Thanks for posting - you're definitely not alone. Today I will not gamble.

However, when it comes to the casino, I have a surge of energy.

I know the feeling all too well. I walk into a casino or one of the local gambling dens (I am near Oregon which has video lottery) and I get a rush that can keep me up for hours and hours. I remember the bus trips to Reno, I'd be up for the 12 hours, then 24 or more till finally exhausted.

Yeah, it's a pain.