I am new to this site and obviously naive to the nastiness and abuse?!?!?

I have been looking at this site for about a week now and decided today to ask some questions and have already been called a lot of nasty names...i know in my previous questions i may have sounded like a bit of a tramp have 3 children to 2 different fathers and being pregnant maybe to another man but just let me explain a few things. My boys father died when i was pregnant with my younger son we had been together for 8 years and although we weren't married we were a happy family, my current partner and i have been friends for years and i found comfort in his arms after my partner died and we eventually fell in love, as relationships all go through ups and downs my partner and i went through a very rough patch and decided to live separately while we sorted it out to ensure our children weren't exposed to any of our fighting, i was an utter mess and one night was so upset my partners best friend came over to ensure i was ok one thing lead to another and after a bottle of wine we slept together (a HUGE mistake that still makes me feel sick to my stomach) and im now pregnant and unsure of the father. Im not one of "those" woman and these 3 men are the only 3 i have ever slept with so please don't call me a sl*t or who*e i really am not, im just a mother trying to do the best i can for my family. Does stuff like this happen all the time, do ppl always get abused???