Mid cycle spotting question

Those who’ve had midcycle bleeding...please advise!!

I stopped taking birth control in 2014. In 2016 I started using GLOW to track my cycles and ovulation, so I have I pretty good grip on my info. I conceived my son Feb 2017. Prior to that I had fairly regular cycles, 27-29 days, however I had to take Clomid to get pregnant (first try worked). Once giving birth I restarted my cycle August of last year (I breast fed). Since then they have been very regular. Except last month my period was 7 days late (cycle day 35). However it lasted the normal time and was the normal flow. It started on 4/17 and ended 4/22, then on 5/3 I started spotting, which has never happened. I knew it wasn’t implantation bleeding Bc my husband has been out of town. I spotted for 3 days, not enough to use any products, and it never progressed past literal spotting...pink and at times red. Then it went away. No pain, no issues. Well here I am on CD 42 and I’m still waiting on my period! I’ve called my OB/GYN and I can’t get an answer other than “we can make you an appt but we can’t get you in for 3 weeks” 😐. I’m having the usual pregnancy/PMS symptoms (sore boobs, tired, moody, etc) but my tests have been negative.

So my question is does the spotting count as my period? Do my cycle days restart? Does anyone have suggestions? It’s been 16 days since we had sex so I’d think it’d be positive by now if I was pregnant