Too early to test?

Okay this is my first post in Glow. So go gentle on me 🙂.

My husband and I are trying to conceive I’m 35 and he’s older.. mid 40’s. He told me the other day that he has a gut feeling that We’re pregnant, I’ve taken a test and it says negative, however my chest is killing me and I can’t stop eating peanut butter (I usually don’t eat that). My bbt has been running at 99.2 to 99.7, I take it in the morning before I get out of bed for anything. I’ve been extremely tired as well. Here the thing, my period is supposed to start in 6 days, do I wait longer and retest or am I really not pregnant and my body is just screwed up?

Thanks in advance for any advice or suggestions you may have.