i started the pill about 3 weeks ago, 2 weeks in i began bleeding...

i started the pill about 3 weeks ago, 2 weeks in i began bleeding, a few days after that started i began experiencing severe abdominal cramps, which i rarely had before starting the pill, and a couple of days ago, i developed a severe headache and nausea, the pain was so severe between the two that i was vomiting. now im still bleeding (should just be my normal period now, placebo pills) but the cramps are still there and still bad. should i get this checked out or is this normal?