Was I wrong for not attending the gender reveal ?

So just for reference me and my fiancé are no longer together however this incident has always bothered me.

Back in October of last year I moved in with my fiancé against my better judgement, I’ve always felt it’s best to be married first then move in together however my back was against a wall and it seemed like a good idea at the time. So during this time I was on medication (trazodone) for sleep and me and my fiancé were trying to have a baby; it was more so his idea I really felt we should wait until we were married but he was trying to force his parent hand into accepting me because his mother did not like me (because of my race) his adopted father didn’t seem to have any issues with me but just sided with his mom to keep her happy. So for weeks I had been sick my appetite increased like crazy and I would wake up with morning sickness my fiancé and I thought I was pregnant he was very excited, around this time his sister-in-law was having her gender reveal which he did not mention to me until the DAY OF and never asked if I wanted to attend the day of her reveal I was extremely sick I woke up around 5am puking my brains out and waking up in cold sweats every few hours so I took my meds to help me sleep, around 11am he tells me he’s heading out to the gender reveal and says “I would ask you to come but I know you’re not feeling well” and i respond “that’s fine I don’t want to be around people who don’t like me anyway but let me know what the gender is my guess is it’s a boy.” He say okay and leaves it wasn’t long until I dozed off. Keep this in mind his entire family doesn’t like me aside from his little brother, even his sister-in-law doesn’t like me all because his mother has been gossiping about me about a issue my fiancé and I had a month earlier I made a bad joke and he took it way to serious and went gossiping to his parents about it without giving them context to what I said, he has told me to my face multiple times that his family DOES NOT CARE ABOUT ME that’s why I said what I said about not wanting to go. A few weeks after the gender reveal he ends up sending me back to my home state because he claims his parents we’re taking his house from him since he listed it as an asset under their business and they needed to make money so they were kicking him out and turning it into an Airbnb, this was a lie from hell his mother was upset he was with me and wanted me gone so they threatened to take everything from him including his inheritance, so he got rid of me period but instead of him just telling me he put on this performance as if I had to be out within that night and threw all my belongings in trash bags. He then goes on to tell me that his mom was upset I didn’t come to the gender reveal in her word “how is she supposed to be in our life and she’s not here to experience these moments with us.” And that he shouldn’t have had to ask me to come! Apparently me being sick by carrying his child wasn’t enough for him and I asked him why he didn’t tell his mom I was possibly pregnant and he never responded. Also because I felt back for not going to the gender reveal I ordered some new mommy stuff for his sister-in-law and he looked at me in disgust and said “why did you get her anything you don’t know her.” OH IM SORRY so because I don’t know her I shouldn’t have gotten her a gift BUT I had to attend her gender reveal?! Help me make this make sense please! I know this is long but was I wrong for not attending the gender reveal?