TTC after MIrena removal

Looking for advice

TTC second baby. Had mirena after 1 year removed November 23rd light spotting then 3 days later had 3 days of clots and heavier bleeding (assume period).

Been testing opk with 2 different brands. One brand has been negative everyday in the morning when I check. The other looks like the picture below. Unsure of whether I’m truly ovulating or not.

Any opinions?