Since you had a normal period last cycle and did not have any intercourse during this cycle, the chances of pregnancy
are almost nil. As you are entering the perimenopausal stage, it could be that the cycles get erratic. Yet, you may get a serum beta-hCG
assay to be conclusive about the presence or absence of pregnancy. You should also get a complete evaluation by a gynecologist as is necessary at this age along with a trans-vaginal sonogram. Hope your query is answered. Good luck.