Ovulation earlier than the calendar says

Hi hi,

I hope I can get some clarity here.
I have a daughter who is 17 months old, and we really want a second one.
I had the Mirena IUD. And I always stayed regular with my cycle.. that was quite disappointing at the time because I hoped for no period while having the IUD, but oh well. The IUD was removed on December 28th. I thought my ovulation would be on the 29th.. but of course I knew it couldn't happen that quickly after removal
.. which was also not the case because I got my period again according to my cycle afterwards. That was from Jan 12th to 15th. So my first question now.. according to my cycle calendar app, my ovulation should be on the 26th. So I did ovulation tests that week and I tested super positive on Jan 22nd and 23rd, twice a day. On the 24th it was immediately negative.. and I kept testing until my actual ovulation day.. on that day I also tested negative twice. So I assume my ovulation was on the 23rd.. but how does that work with my period.. should it come next Sunday or according to the calendar on Feb 9th?
Sorry for my super long explanation.. but it's not really clear to me either, hence why I started from the beginning.
Then I have a second question..
Since I ovulated, I've had period-like cramps every day.. it hasn't gone away. Also more and more symptoms like sensitive breasts with blue veins showing and darker nipples. Lots of acid reflux. More headaches and back pain. Stronger sense of smell. Feeling very warm. And unfortunately lots of mood swings. Probably a bit early for pregnancy symptoms.. but I had this with my first pregnancy which, by the way, wasn't planned but was very much desired, though that one happened while on the pill. Now I have no patience and I know you're better off not doing extra early tests. But yesterday, 7 days before the expected date according to the calendar.. and 4 days before the expected date if it shifts due to early ovulation, I did a highly sensitive pregnancy test.. it was negative. Today I did an ovulation test because I read that it can sometimes indicate pregnancy.. and it was faintly positive.. is there hope, do you think I could be pregnant? Or would it not be.. I know I probably should have that annoying patience and it would be quick if it did happen. But the doctor once said that it seems like I'm very fertile since I once had a miscarriage while on the pill. And I got pregnant with a healthy girl while on the pill too. And I'm very diligent with it so I'm sure I always took it on time. So secretly somewhere I hope it might happen the first round.

I hope for some answers and opinions from you all and once again sorry for all the reading.. but I wanted to share my story.
I don't talk about it with family and friends.. only when it's confirmed. But you notice that sharing it helps a bit.

Thanks in advance x