Fired because of cramping

My cramping is so bad that i have to lay on the floor in the fetal position bc its cold and i feel like I’m about to pass out. Its in my legs in my back i just feel awful 😢 and its not that i don’t want to work i need to but i really just cant move 😞 I’m trying to call out of work today but i cant find anyone to cover my shift and i fear ill get fired if i don’t go. Its so hard to explain to them what I’m feeling like they just don’t care. Im stuck 😩