soo I'm not really sure where to post this but my period was supposed to start on the 30th. according to this app. I took a test yesterday and it came back negative but I've been getting acid reflux like crazy when I lay down (I never get it unless I'm pregnant) my boobs hurt like a mother and even my ribs under my boobs hurt.I'm sensitive to smells. the other morning I woke up and I felt nauseous and was doing some type of weird dry heave thing with out actually dry heaving. I am emotional as all get out. I can't handle smells. I am moody. My boobs are even firm. my question is could it be pms too?