I am 45 with 3 failed ivfs, 5 yrs ago. Benign ovar. Cyst removed then. Last period jul 10. Hcg 464 (20 dpo) & 843 (22.5 dpo) mild cramp, no bleed, ache 1 side. Ectopic, cancer, menopause?

Seems ok. Is DPO days post ovulation? If so, your HCG roughly doubled in 48 hours...That is a good textbook rise! a mild cramp is common, and no bleeding is always good. Seems to me you are pregnant! no indication of ectopic, no reason to think cancer (hcg producing cancers are typically seen in much younger women ie teens and 20's) and menopause doesn't give you rising hcg. So for now, congrats and luck!