Looking for similar stories/5 days late, bfn, regular cycles

Hello everyone! I am new to this app, but have 2 kids already and we are ttc #3. Bear with me, as this is long, but I'm beyond frustrated with my body.

Anyway, I have a regular cycle, with an average of 32 days. My period doesn't ever come exactly to the same day as the last one, but it regularly fluctuates between 28-32 days. I had a lot of ewcm on days 17 & 18, which would have been in line with my app for ovulation, as well as ovulation pain, but I am currently on day 37 with multiple negative tests. We ttc one day last month (May), but my period came as normal, right at day 28/29. We tried multiple times this past month, in line with ewcm and cramps. I was a little crampy at the end of last weekend, thought AF was coming on time, but still got nothing. I have zero pregnancy symptoms, was cramping this morning and was sure AF was coming, but the cramps disappeared and there's still nothing. I feel like maybe I will start my period in the next few days, but I am so confused as to what's delaying it. I have had a miscarriage before having my daughters, but actually had a positive test with it so I'm not sure if this could be a chemical pregnancy or if maybe a fertility booster tincture I've been taking has delayed it. However, what's throwing me off is the very clear ovulation signs I had on days 17/18. I am so frustrated and just wondering if anyone has gone through this before. (I haven't been stressed about it at all until today.) Thanks for reading!