Really bad period pain - day off

So today I took a day off work because I woke up with extremely bad period pain (day 1), I thought I was actually going to be sick. My boobs feel super heavy, more than usual but the pain is just agony! I never take time off but my boss wasn't happy because of the reason, he said other women seem to cope.

As if I'm not feeling rubbish enough, I've now felt guilty over work all day, I never usually get cramps this bad. I'm allergic to ibuprofen, paracetamol hasn't helped. Any suggestions ladies? :(