Period is a week late but i had protected sex and no rips or tears in condom. i have a history of irregular cycles. negative results. pregnant?

Likely not: If you had protected sex, and it's time for your period, but you haven't gotten it, and your urine pregnancy test is negative, then likely you aren't pregnant. It's more likely that your cycle is irregular. If you want to control your cycles more regularly, and have protection for pregnancy, but not STDs, then the birth control pill might be a great solution. Hope that helps

Late period: Reasons for missed/late periods: low body weight, obesity, marked weight ^ or v, over-exercise, endurance athletics, breast-feeding, ^ stress, illness, eating disorders (bulimia or anorexia), anovulatory cycle (no egg released), travel, hormone irregularities, drug use, meds (i.e., birth control) or medical problems (i.e. PCOS). #1 reason is pregnancy.