Period is 3 days late and test is still negative

Anyone else have experience with perimenopause starting at 42? I had always had a 25 day cycle and recently trying to get pregnant with my first. My periods have been all over the place and now I get excited whenever my period is late. Going by a 28 day cycle my period is 3 days late, but my old 25 day cycle would make me 8 days late and I still tested negative as of yesterday. I’m having some pregnancy symptoms but think it’s probably early onset menopause after so many disappointments. Anyone out there have HCG rise later than 3+ days after missed period? I made an appointment with my OB for Friday, but not sure what’s going on :(