17 weeks with cramps

JTJKH
Is anyone else experiencing cramps? Thursday my husband had to take me to the ER for severe migraine and I was bleeding lightly. This is my third pregnancy and I've never experienced cramps before. They're almost all day long and not triggered by anything I'm laying down in bed not moving and I get them
I was wondering if I'm the only one and if not what has your OB said about them? 
I know they aren't ligament pains this is my 3rd I'd i know the difference these are like period cramps with brownish red discharge