So confused

Currently on cycle day 66!!! Normally my cycles are around 30 days so this is so frustrating! Especially when your trying to get pregnant. Never had any issues with my cycles in the past and got pregnant after 2 months of trying for our first. I had a blood test 2 weeks ago just to rule out pregnancy and it was negative, of course. I have an appointment in January to get checked out if my period doesn’t show by then. Anyone else have sudden irregular periods and eventually get back to normal??