Can't have a baby.. But everyone else can sucks to be me

So I wasn't sure where to go with this until I found this sub... So here it goes. I'm 28/f married with one beautiful little girl who is almost 4. My SO and I have been trying for another baby since our LO was only 6 months old. After I had her I got on the shit which apparently screed me up bc not only did I gain 70lbs my periods are so out of whack that I literally have a period 2-3 x per year now but when I finally do get it I bleed for up to 6 weeks! Its horrible and i have been to several different doctors over the course if the last 3 years and they have just started telling me I'm fat.. This pisses me off more than anything! Now they have told me in order to have another baby I must lose 100 lbs mind you I have never been that small not since before I hit puberty when I was 13. So since I have serious issues losing weight I've given up on trying to become pregnant (sadly) of course. Now this is where it really pisses me off .. My SIL's best friend who already has 1 LO who is 3 got pregnant about 12 weeks ago since she doesn't care for the one she has now she was talking to my SIL about abortion my SIL told her about me said that I would take the baby adopt it and I would happily well she thought that was a great idea and was going to start bettering her life and have the baby for me .. Well I got so excited when I heard this and then 3 days later I get news that she is in the hospital had gotten plastered and got her ass beat for being mouthy well come to find out she had the abortion the day my SIL had talked to her but didn't let anyone know ... So no I'm depressed ... Then yesterday I get a call about my cousin who has just had her 6th baby mind you this bitch doesn't give a damn about the kids just the check she gets for each kid bc she is drawing her own check bc she can't work due to a brain injury when she was like 16 Shea fine just can't function at times ... Anyway so I get the call and my mom tells me the baby was early and my cousin wasn't prepared so she went and bought the baby a few outfits and my cousin refused them bc they were pink so my mom took them back and then while she was there the baby had been refusing to eat all day almost 24 hrs so my mom was trying to get the baby to eat and my cousin told my mom to leave the baby alone and said " oh well if she doesn't eat that is her own fault" so I called my cousin when I hung up with my mom and told her look I'll take the baby off your hands if you can't handle her and I asked her the baby's name and she replies with " what's it matter I don't even remember the rest of their names" so this no named baby is sitting in a hospital with her druggy mom that doesn't give a damn about her and I'm sitting at home depresses as fuck bc I can't have a baby when I know I deserve one more than these people who don't want their babies. I'm not sure why I wrote all of this maybe for some extra support idk