BBT chart after miscarriage

I had a miscarriage on Feb. 11. I usually ovulate on CD 13-15. I had all the symptoms two weekends ago (feb. 23-24) and assume I O’d on Feb. 24.

Normally my temps are higher, but wondering if it changed b/c of miscarriage. I assume I am about 13 dpo, and started cramping and spotting Tuesday. I have no idea what’s going on? So far BFN and my periods are usually every 26 days.

Please help me. I’m still new at this. There is no coverline, so how do you figure it out? Thanks!