My menstrual cycle between last month and this month is 30days. i had sex on the 15 and 18 days but am nt pregnant. my previous cycles were 32days?

30/32 about the same: An earlier menstrual period may be caused by changes in hormone levels, which can be due to anxiety, stress, overworking, intense exercise, fatigue, or excessive weight gain/loss. An ob-gyn doctor can check, if symptoms are worrisome or recur. However, 30 days is not much different from 32 days... Maybe next month will be 32 days again.