too early to test?

I had a miscarriage June 15th and I'm trying so hard not to test again (I tested yesterday but it was negative(Walmart 88cent test)) I usually have longish cycles (sometimes up to 42 days). I dont want to waste another test. I ovulated between the 7th and 10th.

should I just test again or wait. if I wait... when should I test?!? cause I dont even know when this period is due😫

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