Why Am I Two Days Late Without Pregnancy?

After ectopic surgery you can try to conceive after 3 months 

You can do a home pregnancy test and also go to a gynecologist. They may recommend blood test and ultrasound to confirm the pregnancy

Considering that you had sex on the 7^{th} day of your menstrual cycle and took an oral emergency contraceptive, it is highly unlikely for one to be pregnant. Bleeding after taking an emergency contraceptive pill is normal; it occurs because your body reacts to the increased dosage of hormones in the tablet. Nevertheless, if you have any apprehensions or develop any weird symptoms seek a gynecologist for accurate diagnosis.

There can still be a chance of pregnancy. While the risk might be lower due to the short duration and no ejaculation, there's no guaranteed safe time for unprotected sex. Take a test to confirm.

If someone vomits everything they eat or drink, along with frequent headaches and pain in the back, this could be a sign of various things not just pregnancy. These symptoms may result from a stomach virus, food poisoning, or even migraines. Consult a healthcare provider for proper diagnosis and treatment. 

If your period is late, it’s okay to worry. Stress can throw off your cycle, causing it to be late or even completely miss it. Feeling tired or throwing up could also be symptoms of stress. If you took the morning-after pill and then got your period, you probably aren’t pregnant. It is better to wait a little longer and see if it comes. If your period still hasn’t shown up, take a test just to be sure.