Is it pregnancy or menopause?

Im 41, and my period is 2 weeks late. My period had always been every 26 days since I was 14, but the one before this last one was at the 21st day and now is two weeks late. I was not taking the pill because my husband was working out of town for more than a month, and when he came I was not on my ovulation days anymore and I preferred to wait to start taking my 21 pill box. I have tried 4 pregnancy tests (the ones you buy at the supermarket) and they are negative.. Should I consider this might be the beginning of menopause or should I wait a little bit more to be sure Im not pregnant? Im feeling fine, just feel a little bit bloated at times...