It is difficult to diagnose without performing physical examination. On the other hand, the lower abdominal pain and back pain are frequently the early symptoms of pregnancy. As you have had a missed pregnancy once, it is advisable that you make an appointment with your gynecologist for an evaluation. A test can be taken between 1 and 2 weeks after a missed period.

It's important to know why periods can be missed. Stress, sudden weight change, intense workouts, hormone irregularities, or some diseases might lead to this. It may not be safe to take period pills without knowing what caused it. Instead, go back to the doctor. They could conduct tests and find out the exact problem then give appropriate treatment.

It is common to worry when your first sexual intercourse is not on time. It may be a bit late due to stress, weight gain hormonal imbalance, etc. If you think that you might be pregnant then do a pregnancy test to calm down yourself. Remember that every time one should use a condom during sex to avoid pregnancy and getting infections like HIV. 

You see­m to have an issue with your urinary area and private­ parts. The pain down there, ne­eding to pee all the­ time, feeling thirsty, and proble­ms with your vagina. Those are signs of infections like­ a bladder infection or a yeast infe­ction. For a bladder infection, doctors give antibiotics. And for a ye­ast infection, you need anti-fungal me­dicines. Drink lots of water. Wear cotton unde­rwear. That helps stop these­ infections from happening.

The white discharge could be one of the normal things that happen from time to time. Hormonal modifications in your body can also be the reason for that. The emergency pill you took may be affecting your cycle as well. If you're still worried, a pregnancy test can be the reassurance you need. Try not to stress - it can be the reason for your period to be delayed too.