Period cramps but No period for 2 months and not pregnant

I’ve had irregular periods for as long as I can remember. My normal cycle lasts around 35 to 45+ days and my period is completely unpredictable. I usually get signs that my period will start around 2 weeks before as I have cramps and sore boobs. Even then I never really know and sometimes it can take longer. I’m sick of this constant torture as the cramps can be be quite brutal sometimes. It’s like my body is forcing me to start my period but my period doesn’t want to appear.

I’ve become a little worried as I am planning on having a baby soon, but obviously if my cycle is completely all over the place this is going to make it harder. I do suspect I probably have PCOS as I have a few of the classic symptoms eg irregular periods/ weight gain/ etc.

I took two pregnancy tests and both were negative.

Anyone else have a similar experience?