Digusting symptoms and conditions

I'm just starting my second week of Femcon Fe and I'm not impressed. ever since i started taking it i've had consistent bleeding and really painful cramps. the stabbing pain kind that go all the way around to my back. there have also been really bad headaches too. usually I'm like a man about going to the doctors ( aka i don't want to go and usually dont) but the pain was so bad last night that i almost went to the er. is anyone else having cramps that cause back pain too?