Ok so I am 19 weeks 5 days.... but I have a question that has nothing to do with my pregnancy. ... four years ago when I was 17.. I had a bunch of 2 liters fall on my head in a grocery store... I have a bump (knot) on my head.. but only recently has it started bothering me..... I'm always dizzy... always light headed.. and sometimes blurred vision... could I have a tumor? Sorry if this sounds stupid.. but could I have cancer? Do yu think it's life threatening??