My sister said I'm being a jerk

So I'm 34 weeks pregnant and last month my bf broke up with me out of the blue. He's barely talked to me since then but says he wants to be there for our son. I haven't even seen him since the split. This breakup has been very hard on me mentally because I really loved him and I'm trying to pick myself back up. Well I decided I didn't want him in the room while I'm giving birth because it will just make me feel uncomfortable and I'm already going to be dealing with a lot and I told my sister today and she just thinks I'm being a jerk but she doesn't understand at all what I've been dealing with. I've been a literal emotional wreck because of this man and even had to go on antidepressants because my mental health took a major hit. She got me so worked up making me feel like the bad guy that I started crying and now I just feel bad. He will be up there after the birth and I'm not going to keep him from his son. I'm already trying to mentally prepare myself for seeing him since the breakup because I already know I'll probably break down. Am I the jerk? It's not even about me being petty or mad he broke up with me because that was his choice and me being mad or petty towards him won't fix anything so I've just come to terms with it at this point.. She's literally never had to deal with a breakup while pregnant so she just doesn't understand how hard it is at all and she never will. I just don't know how to feel now.

Sharayah: It's definitely not out of spite. I still care highly for the man and I let him know how I felt about everything and that I would no longer feel comfortable with having him in the room because of the whole ordeal and how much I was going through mentally. I just want my mom in there or I'd just rather be alone.. This whole thing has just been a lot on me. I just want someone in the room who will make me feel comfortable and not put me in an awkward situation while in labor..

Thank you all for the comments. Between hormones and everything else going on I've been super sensitive to pretty much anything anyone says to me that makes me feel bad. Usually I don't let anything my sister says bother me at all bc she literally acts like mostly everything I do is wrong if it isn't how she would do it and she's been that way since we were kids but I think unless she's been in the situation she shouldn't have any say in it. She said she would never make her child's father miss the birth of their child just because they broke up because its messed up and wrong (she can't say that because shes never been through heartbreak at her most vulnerable time so how would she know how she'd feel or react 🤷‍♀️) She has no idea how much this breakup has affected me bc she's hardly ever around.. I honestly didn't expect her to call me a jerk for not letting him in the room because she's given birth 3 times so I figured she'd understand how stressful it is already and understand where I'm coming from but I guess not. I definitely feel better after reading your comments because I did feel really bad. I don't want him to miss the birth of our son but I also don't want to be uncomfortable or put in an awkward situation while giving birth just to please him. It's about me! Not him, her, or anyone else.