Banged my head now being sick

So I may be completely overreacting but I beed a little advice!

I somehow managed to bashed my head on my steel spiral stairs around 9:30-10:00pm on Thursday night and put some frozen peas on my head because I had no ice! Anyway I started awake till around 3am to make sure I was sick etc and I was fine, went off to sleep me woke up yesterday morning and was sick and continued to be sick 3/4 times yesterday and had a headache last night. Today I now can't keep my fluids down but I don't know if it's to do with me banging my head or just my pregnancy sickness because my sickness has been really bad throughout my pregnancy. Help!?!?