need advice please!!

My fiancé is a rapper and he has a performance tonight at 11pm. Well, I went to a NBA game last night and I didn't get home until 1:30am and I had work today 7am-3:30pm. I'm very tired, I have my period so bad and I have work in the morning at 7am tomorrow. He said he understands if I don't go but I just feel so horrible about missing his show. What would you ladies do? I also have some social anxiety and two of my friends cancelled on me so I would have to go alone. If I didn't have anxiety I wouldn't care of course but anxiety makes going to a club alone a nightmare; even if I am meeting up with my fiancé's friends. What should I do?! Help!!! Thank you.