Bbt chart with 2 dips in luteal phase

So i had a .4 degree dip at 4dpo to my coverline and then it rose again, then had another .4 degree dip at 8 dpo to my coverline.. along with a small amount of brown spotting.. i guess we'll see what my temp does tomorrow but it seems too early for AF? Shouldn't start for another week.. but it's hard to say after a miscarriage last month at 5 weeks (thinking it was a chemical pregnancy) . It's only my 2nd month off of birth control so I don't know how long my cycles are.

I've been having dull aches on and off on the left side for a couple of days too so hopefully these are good signs!