Has anyone else’s period gone out of whack since ivf

I had my first round of ivf in July, it was a fresh transfer which failed. I had a withdrawal bleed and then a bleed in August but now I’m still waiting for my next period. I’m usually approx 35-38 days cycle but I am now 45 😩 i keep getting the odd twinge like I may come on soon but I don’t. I’ve had that for the last week. I’m not pregnant.

Anyone else had this?