Ovulation tests are dark

So my tests have been super dark for three days now. I’m sick of wasting tests when they won’t get dark enough to be positive. Have no clue where I’m at in my cycle since I had a miscarriage 4 weeks ago and haven’t gotten my period again. Anyone have any advice or think I could be ovulating soon?! The bottom test is the one I took this morning, other ones are from the past three days. Thank you in advance for any and all input ❤️