ok work problems again...

Ok here we go again I think I finally realized why I have been acting so crazy and thinking tht I will loose my job when my 90-day trial period, or whatever its called is over. As some of yall have noticed tht I keepo having these bad thoughts/feelings tht I will loose my job once the summer is over. i keep thinking tht its for one reason or the other, they were that I keep messing up well from the beginning I of course had some errors while learning what to do and whatnot. Well I guess these feelings have started going away some after I spoke with my boss about my performance, which isnt perfect but it is improving whcih is good.
But today, on my way to work and if ya know me I have never been the one to be somewhere extra early, I like being there right on time or just before. Well today I was on tht same pace which would have gotten me there5 mins before my start time. But as I was driving the highway and one of the lanes was blocked off for like 2miles due to bullshit streat cleaning so knowing tht I prolly would make it a lil late. At this job you cant even be a minute late still counts the same as an hr late. So i called and told my supoerviser tht i would prolly be a few minutres late. I really dont think that it really matters if I called or not, so I keep asking hwo many tyimes are you aloowed to be late in this period, Im sure you prolly cant be late at all, but they do not know the answer my coworrkers think tht your not allowwed to be late at all, which makes sense.
 So now I have this reason tht keeps running through my head for the reason tht I eventaully loose this job which I keep having these weird feelings. So now having these 2 lates in this first 90 days even if they were only for a toal of 3 mins. Meaning the first time I was only one minute late and this time I was 2 minutes late. Even if I called bioth times I still dont think tht it is good enough and I am going to loose my job for these reasons the end of august. Great more worry here...