Is ovulation coming up, or have I already missed it?

Hi everyone..

I'm currently in round 4 and have started using ovulation tests.
Because I have a very irregular cycle, I started testing early.
Today is day 21 of my cycle. So far, no positive results, but I've been very close.

When the lines became clearer, I tested twice a day so I wouldn't miss the peak, but today around 6 PM, my second line was much fainter than before. I don't consider the tests I've had so far to be positive.

On 09-20-2018, I had a small bleed. It was very light, only when wiping.
It's been very wet down there lately with a small amount of white discharge.
Yesterday I had some period-like cramps, not as intense as during my period
I had these cramps today too, but only for about half an hour.
While checking my mucus today, I could pull a thread about half a centimeter long. I didn't find it very clear either. I could only do this once; afterwards, it was just very wet again.

Now I'm wondering if I missed it? Maybe it was a very short cycle or my LH levels are fluctuating a lot.

Has anyone experienced this??