Could I be pregnant if I missed period?

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. 

If a period was 11 days ago, and there was unprotected sex around that time, then there is a possibility of becoming pregnant. Symptoms might include missing periods, feeling tired, and vomiting. 

It is indeed probable that what you are feeling is an allergic reaction. You are advised to make an appointment with a dermatologist to diagnose and treat. In this case, they will diagnose the underlying cause of your issue and suggest the needed solution. Get medical help immediately

Not having your monthly period can be one of the side effects from Diane 35. But, in that case, we would rule out pregnancy as the reason. It is essential to talk with gynecologist and ask them about your condition's further guidance.
 

Paraovarian cyst management typically doesn't significantly impact future fertility.

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.