Angry rant

I hope this is all the hormones but I have been exceptionally miserable for the duration of my pregnancy. Nothing has gotten me excited or even happy and I have felt regret multiple times for planning this pregnancy. To make things worse my sister who originally did not support me at all (and therefore I told her to leave me alone and stop pretending to be concerned) now thinks she has to be my cheerleader. She literally acts like everything is so important and the most exciting thing on earth when it comes around. I keep telling her I want things low key and she doesn't listen then gets annoyed when I don't respond how she wants. For example, this week I found out the babies genders, we were supposed to have a family dinner to reveal but my dad got sick and ended up in the hospital. I canceled dinner and after 9 hours in the hospital she shows up with balloons and flowers for me. I kindly say thank you and give hr a hug and I get a lecture how I should be happy and thankful and excited. She then asks what I most look forward to recieving from my registry and when I respond by saying the stroller, she tells me she is going to get it for me. Again I say thank you but that it is totally unnessary at which point she responds she insists but wants to see my "suprise face" like I am a little child. When I just smile she tells me I am ungreatful. The next day she breaks the news to me that she has decided to try to have a baby by asking my  fertility specialists name and announcing how "excitingly amazing" it is that we are seeing the same Doctor. I responded it isn't exciting or amazing as there are only a few and it means that some thing is wrong with both of us which is nothing to be excited about. She stormed off crying saying I didn't understand how hard it was for her to have to see him... Like I hadn't just spent months having to see him myself. I know she has best of intentions in mind, and she is trying to make me more excited but it is all making my blood boil. Worse off my mom is jumping right in with her. I don't know what to do as telling them as nicely as possible about it has done nothing and somehow now I am the Unthankful bad guy. Thanks for listening to my rant. I can't stop ruminating over it and can't seem to find a way to settle down.