Do you think this is pregnancy symptoms?

The past three days I have had strange feelings. I am 7dpo which seems too early to test, but AF is late by three days. Glow and I were both expecting her to come Sunday and today is Tuesday. 2 out of the past 3 nights I have had really bad acid reflux being woken up out of a sound sleep...last night I had a metallic taste in my mouth and I read that it could be related to pregnancy. I've also had a nauseated and dizziness experience over the stove making breakfast for my fiancé. I felt like I needed to vomit, but didn't, I needed to sit down and crank up the AC. It eventually went away and I felt better after a shower. I don't want to test too soon incase I am disappointed and AF decides to show up tomorrow, but do you think I might be?