First time anal!!

So my boyfriend and I have been together for a year. On our anniversary we decided to try something new, for a while now he has been asking for us to try anal but I was always so scared. Today ai decided to finally let him try. All I have to say is that that was one of the WORST experiences of my life. It wasn't really necessarily the pain but the whole time I was so worried about 💩 myself because that's exactly what it felt like... For some reason after we finished I got super emotional and started crying. He just laid nxt to me and we decided to never do that again. I don't understand why it got to me so badly 😞 But at least I know that's not for me and I never wanna do it again.