I think I am loosing it

I have had so many problems with my sister, she is really truly nuts!
To make it worse, getting a BFN this month really sent me into a massive tail spin, to the point that I smashed a cup in sheer anger and frustration. I just started thinking about everything. About how angry the problems with my sister made me, about how unfair it is that I lost my baby, how I just can't get pregnant and I snapped! I swear I just suddenly saw black and then heard this almighty smash and then my husband came running down to see me. I was just standing there holding my head the cup all over the floor about a metre away from me... this is the worse I have ever been, it was like I was not in control of myself at all.

 
I am still trying to recover from it all today; it just all feels so hopeless...