What’s going on? 🤷🏼‍♀️

My body is so confusing! Please help!

Sorry for long post.

I’ve been TTC for 16 months. I’ve had quite regular cycles 27-29 days and when I’ve temped and done opks I’ve found ovulation to be about CD15. I also got spotting and cramps at ovulation.

I had a blood test CD21 one month and an ultrasound and everything looked good.

I took a break from monitoring for a few cycles then started again last month after having a CD12 ultrasound - good sized follicle. But no positive opk! And I ran out of tests 🤦🏽‍♀️

But from cramps and total length of cycle I think I ovulated late. Day20 possibly. Very annoying

This month I bought clearblue opk to try - started CD10. Was negative. CD 11 did something wrong, was an error.

Today, CD12 a smiley face! 😳 And I’ve had indigestion the whole day. Or cramps?

Unfortunately I only started temping yesterday lol so that won’t be a help.

So I have a few questions?

1. Is clearblue reliable? Did I possibly ovulate early this cycle?

2. Should I continue with the opk tests?

3. I was supposed to do another progesterone check, do I do it CD21? Or 7 days from now?

4. Can sex make ovulation start early? We BD this morning

5. Why is my body being so irregular lately 😭

Thanks for read