Need to vent😡

I'm sorry ladies I just need to vent... I'm a stay at home mom with 2 little boys (ages 2 & 4) my husband works Saturday-Monday overnights & my mom is an over the road truck driver & don't really have any other family & friends to talk & vent to, so on days like this I have no one to talk to about what is bothering me 😔 I can no longer hold in my frustrations. My husband and I are actually in a custody battle with my ex (my oldests biological) he ditched a week after I found out I was pregnant & has always rejected my son, he recently started dating a girl whom has 3 children & has now decided "he" wants a relationship with my son. He now blames me for not being in his life & said that I've been hiding him... I have lived in the same place this whole time & even have the same number. My husband has been by my side since I was 4 months along & has always been daddy, no one knew my ex even had a child till Easter of this year when he started visitation (that's how much he rejected him even after DNA proved he was in fact the father) he is now trying to force his way into my sons life saying my husband isn't his dad & that he has every right to take my son cause he's his too. He has even filed for custody... I don't mind him having visitation but he works overnights all week he heads to work around 4:30pm & doesn't get home till around 7am. I have allowed him visitation from 11am-4pm on Thursdays & every other weekend. 90% of the time he is asleep when we arrive & he thinks I will just leave my son with his girlfriend till he gets up & everytime I refuse he starts a ton of drama over it, am I wrong to think parenting time he should be with a parent not some girl who can't even take care of her own children?! He is now trying to convince me to let him have my son every other week (which will never happen) & tries telling me if I won't agree the courts will (which again will not happen since he is not capable of being there for my son) he is now harassing me about having my son for a week August 31st-September 7th & says since he told me 60 days in advance that legally he can which would mean he'd actually have him August 29th-the 7th because of his weekend (10 days) my son starts school tomorrow so really from the time bio got off work (if he doesn't go to bed) 7am-11am when my son heads to school is the only time he would actually be with him & from 3:30-4:30 the rest of the time he would be with the girlfriend. We have already had problems with her oldest biting my son & breaking skin, pushing him down & cutting his forehead, & all her kids ganging up on my son & spitting on him & beating him up... I had an attorney & now am in the process of finding a new one because they got her kicked off the case, I am 6 months along & have so much stress over this it has literally made me sick. I can't even enjoy my pregnancy because all I do is worry about money for an attorney plus what she needs then watching every move I make & dealing with all the appointments for court, attorneys, guardian ad litems, visitations etc. my hair has started falling out... I'm 21 I'm not suppose to be losing my hair because of stress 😭 sorry for such a long post I just couldn't hold this in anymore