3 years in a row

I'm pregnant for the third year in a row. This baby was an oops i was on bc at the time. But my question is. Is it common to already be swelling like really bad at only maybe 6 or 7 weeks? I get really bad headaches dizzy and swell alot.. My other pregnancies were easy no side effects or anything and I have 1 girl 2 boys. Is it normal