Could unprotected sex without withdrawal cause pregnancy?

Unprote­cted sex during your period increases the chance­ of pregnancy. The reason is that spe­rm can live for days inside you. To avoid pregnancy, you can use­ emergency birth control. A morning-afte­r pill is one option. You must take it within 72 hours after unprote­cted sex. It lowers the­ risk of getting pregnant. If you're worrie­d, act quickly and get the pill.

It's difficult to determine the exact cause without further info.. Stomach aches can have various causes which are unrelated factors like stress or dietary changes. If you're concerned about pregnancy then you may take a pregnancy test for confirmation.

These might be signs and symptoms of other health conditions like endometriosis or pregnancy complications. Consult a gynecologist for thorough diagnosis and treatment.

You are concerned about preventing pregnancy after one month. If you're afraid it will happen, then the best way to prevent it is to use emergency contraception. This can prevent pregnancy even after unprotected sex. It's important to act quickly and take the emergency contraceptive pills as soon as possible. 

When you have had a termination and taken some drugs, your body will need time to get better. It is important not to rush into having sex again too soon. Use a condom each time you have sex after an abortion to protect against infections. Take it easy and pay attention to your body’s signals – if something doesn’t feel right, stop. Talk to a doctor if there are any problems or if things don’t seem to be going back to normal.