I need help!

Tatum

I’m so worried right now! I thought I started my period yesterday. It’s very light but dark red/brown. If it’s not my period I’m cycle day 29 and either 12 dpo or 8/9. Bbt shows I’d be 8/9. This morning my bbt went way high! 98.4 and it’s never been above 98.12 before! Ovulation test is somewhat dark. Reads at 0.52. I use a Mira and I checked my progesterone(pdg) and it’s over 30?!? I took pregnancy tests today and they are negative. I rang my doctors nurse and she just said check pdg tomorrow and take another pregnancy test in a week if my period doesn’t fully come on. All the signs are showing I’m pregnant but tests are negative!! Is it just too early??