I've been having extreme nausea for the past 2 months with no vomiting, it usually starts when I wake up and lasts throughout the day. My breast also feel quite heavy and full but not sore or tender at all. My mouth is also producing a lot of salvia which is very random for me and I'm always hungry. Since the last time i had sex i have had periods for both months however the last one was not really a normal period for me. I took a HPT a week ago and it came out negative so I'm not really sure what this could be.