Nausea

So I am sixteen weeks pregnant, and was counting down to the end of the first trimester with the hopes that the damnable nausea would slowly pitter out and for awhile there it looked like it was going too, now though its just gotten worse, so bad that I spent five days in hospital getting hydrated. My parents seems to think its a gender thing, My MIL was sick till seven months his my DF and BIL, but my mum wasn't sick at all with me and my half sister, but my Nan was sick with Uncle David, but not Aunty Joanne, so Yeah. 
I hate being sick.