cramps before presentation help!!!!!

Ok I have class in 1.5 hours where I have to do a presentation. I just got my period last night and the cramps have been bad since even though I took a midol last night and it didn't help. Now I have bad cramps before class and I have the shits too. What do I do?! How am I gonna stand up there and own it when my insides are giving me a huge middle finger rn?! Ladies, help!!!!