Any alternatives after unprotected ovulation sex to prevent pregnancy?

After the intercourse if you had periods in March, April, and May, on March 5th, it's unlikely that you're pregnant, as regular periods suggest otherwise.

ASSUMING a 28 day cycle, your period is late. Stress and hormonal imbalances can cause this. Take a PREGNANCY test to be sure. If negative, wait a few more days and test again. If it remains negative, see your doctor... They will check for underlying conditions that can cause a missed period such as POLYCYSTIC ovary syndrome (PCOS) or THYROID issues...

By assuming a standard ovulation cycle of 28 days, ovulation occurs at the time of the next period which is 14 days prior to the period. Thus, your last period began on August 20th, hence you are likely to ovulate on or around September 3rd. Some indications of ovulation are differences in the thickness of cervical mucus, slight abdominal pain, and a rise in basal body temperature. You can also use ovulation predictor kits to check for ovulation.

There isn’t much of a chance that you’re pregnant. Your partner didn’t ejaculate, and there wasn’t any pre-cum. Also, your period came on time. If you take extra pills or have breaks in your pack, it can sometimes affect your hormones. However, only making this kind of short-term change may not result in long-term problems. Getting your period after taking 5 pills and then going off them could have caused some hormonal changes but if eventually things evened out when it came back.

The odds of becoming pregnant during your period are typically slim; nevertheless, the occurrence is not impossible. Manifestations of gestation may involve skipped periods and vomiting. To avoid pregnancy and STDs, the use of a condom is essential every time you have sex. Testing for pregnancy may help assuage your fears if they're there.