Period after HSG!?!?

Christine
So I just got my first period after my HSG and holy crap I'm in pain. I could feel the cramping coming on and have terrible cramping and back pain. Additionally, I experienced a migraine today and am cranky and feel almost nauseous from the discomfort. I also experienced an extremely heavy flow for day one. Ugh! Can someone tell me it gets better!? This is awful!