Yes engagement in unprotected sex may lead to pregnancy. Although the male partner might not have ejaculated, pre-ejaculate fluid also contains sperm that may cause pregnancy. The only way to prove the pregnancy is by going for a test or seeking medical attention from gynecologist. In case of any symptoms related to pregnancy such as missing a period, it is advisable visiting gynecologist

Incomplete abortion can lead to complications like infection, heavy bleeding, and sepsis. Treatments include dilation and curettage (D&C), misoprostol to cause contractions, and vacuum aspiration to remove remaining tissue. Please consult a gynecologist for personalized advice. 

 

On average, the menstrual cycle lasts from 3 to 7 days. There are pregnancy possibilities even if having sex at any time, but the chances are greater during ovulation, which usually occurs on the 14th day of a normal cycle. If your period started 4 days ago and you have a 28-day cycle, ovulation could be in place now. 

If you’re worried about a possible pregnancy, don’t be. The chances of it happening from what you’ve said are very slim. If there was no ejaculation or confirmed pre-cum inside her, then there is almost no risk at all. Stress can also delay periods. Tell her to relax as much as possible. If her period still doesn’t come, take a home pregnancy test to be sure. 

You can confirm either with a home pregnancy test or a urine test to confirm pregnancy.