Should I not be upset?

My husband is currently planning is 33rd birthday trip. This will take place in October. I'll be nearly 9 months pregnant. He has chose to to a festival that is about an hour and a half of away from our home. He goes there every year. I told him that I didn't think it was smart to go on a trip when I'm nine months pregnant. I also don't think its a good idea for me to be walking around the festival all day. Especially since it is typically hot. He understood this. I told him he can still go to the festival with his friends. He said he wanted to stay in a hotel room for his birthday since a lot of his friends will be coming in from out of town. I told him that would fine. He suggested we go to a hotel that has a very cool theme and is only 30 minutes from our house. I told him that would be perfect because I can go too and just stay at the hotel room or work while he goes to the festival. This hotel is only 10 minutes away from our hospital and close to my workplace. I can particpate in some of his birthday shenanigans. That was decided about two weeks ago.

Today he tells me that no one in his friend group wants to go to the hotel we chosen. That they have picked a differnt hotel, that is close to the festival. My feelings immediately got hurt. I explained to him again that I don't think it is a good idea for me to go on a trip, be away from the hospital, and be in the sun at 9 months pregnant. I also explained that we have never spent our birthdays apart and that the hotel close to our house was a good compromise. We would still get some time together. He again said his friends didn't want to so he is changing the plans. This may be selfish, but I asked him how come he can't try to accommodate me. Why cant he tell his friends that they can stay at the close hotel, but he and I will stay at the one we originally picked? He can meet up with them at the festival, we get time together, I'm not miserable in the sun, and he would have a good birthday weekend. He kept saying how he wants to party at the hotel with his friends. So I guess I'll be staying alone at our home during his birthday. I don't want to out at a festival miserable that pregnant.

So, am I crazy for being upset? Should I just go to the festival and not worry about being so pregnant? Was it selfish to ask him to accommodate me so we can spend some time together during his birthday. Any suggestions for another compromise?