27-Year-Old: Missed Period - What Could Cause This?

From the beta hcg values, it appears that you are not currently pregnant. Irregular periods are often symptoms of other medical conditions. You should consult a gynecologist in order to review and diagnose. They can recommend you proper medical advice and treatment regarding your condition.

You did the right thing and took the emergency contraception pill. The little period blood you had may be due to your body getting used to the pill. Blame it on the pill, or do you think it’s a sign of pregnancy? Moreover, you should know that yet another headache is the most common side effect of the emergency contraceptive pill. If in doubt, take a pregnancy test after a couple of weeks. 

Primolut Nor Tablet cannot cause a miscarriage.. It is primarily used for menstrual irregularities and endometriosis.. However, it may cause some side effects like NAUSEA, headache, and irregular bleeding. Consult your doctor before taking any medication. 
Remember to always take caution with medication..

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. 

Early pregnancy spotting isn't always conce­rning, notably around your expected pe­riod. With rising hCG levels, spotting may signal implantation. Howeve­r, heavy bleeding warrants me­dical attention, especially if accompanie­d by intense pain. Staying hydrated and we­ll-rested aids this delicate­ stage.

Toward the middle of the pregnancy, a smaller belly at 17 weeks might trouble you. If a belly is small, it can be because of the baby’s position, the way your body is holding the baby, or many other reasons. In the majority of cases, it's not a big deal when your health conditions are within normal limits. Continue to eat well and go to all of your pregnancy medical check-ins to ensure that you and your baby are healthy.