Anal Gone Wrong..?

My Boyfriend and I Just Tried Anal For The first Time LastNight... it was more unexpected than anything he really didn’t warn me nor mentioned it.. it just happened. I had no idea what to expect I had never tried it and he says it was his time also.. but ok (tmi) things got a LITTLE messy and It killed the mood for him completely and for me because I was super embarrassed I had no idea what was goin on until he said it.. idk he said it was fine but he did make fun of it for the rest of the night and i was already embarrassed enough I didn’t know how to look at him and he was just making it worse.. the last comment he made was “Well I won’t ever be doing that with you again ‘Gross’ ha” then he just kind of pushed me to the other side of the bed and he fell asleep I just turned around and literally cried myself to sleep 😒😔. Any opinions ? Or Advice ? I still feel really bad and embarrassed about it I don’t want him to feel grossed out by me..