I have been on Loestrin 24 for 4 months now and hadn't had any bi...

I have been on Loestrin 24 for 4 months now and hadn't had any big problems with it until I get to the sugar pills for me to have my period. I have had the worst cramps that I have EVER had in my life. I've never been on birth control before I began taking Loestrin, so I'm not sure if this is normal. My periods are shorter, but the pain is unbearable. I started it this morning and I have been in bed all day long in excruciating pain. I almost drove to the hospital but decided to hang in there. Has anyone else had a similar problem? I haven't gained too much weight except I've gone up an entire cup size in my bra which I didn't mind too much except that my boobs hurt almost constantly now if I don't have a bra holding them up! My main concern is the abdominal pain. Any thoughts?