Confused

So since Sunday, I've been having random bouts of nausea to the point where all I can do is lay in bed until it passes; and its lasted for hours at a time. Just the sight or smell of something can bring it on which has everyone around me saying I could be pregnant. But I got what I believe is my period early Saturday night. My MIL says she had a "period" for 3 months with my fiancé and his brother so just because I'm bleeding doesn't necessarily mean anything. I'm pretty sure I got AF or maybe it's from being overheated since its been in the high 80s since then but idk. I just don't wanna get my hopes up because of everyone around me only to get a bfn and tell everyone I to you so and be devastated. Ugh. Idk what to do!!!