Not feeling well..

I am 38 weeks and 3 days and just not feeling well the past few days. I'm super nauseous. Last night my nose was so stuffy, I couldn't breathe, I was dizzy and I had to sleep with a bucket next to me in case I was going to puke. This isn't normal for me and I'm not sure if I should be concerned or not. I've been drinking tons of water so I don't think there's a chance of dehydration or anything. Any help would be appreciated!