Constant nausea?

I regularly have sex and we use protection but ab a month ago my boyfriend and I had sex and he came inside me. At the time I did not have the money to get plan b or anything of the sort. Now a month later anything I eat I throw up and get extremely nauseous. Whenever I smell anything remotely strong in fragrance I throw up. My boobs have been sore and my discharge is a thick white and my whole body is sore and I have also gained some weight in the month. I plan on calling my doctor I just wanted to see some comments on here first. Anything will help