Do I need to worry about pregnancy at 16?

The risk of pregnancy from unprotected intercourse increases if there is ejaculation, but it's still possible to conceive even without ejaculation. Consider taking a pregnancy test to confirm.

Irregular periods, weight gain, constipation and itchiness may indicate a medical condition. One should seek the help of a gynecologist in cases where periods are not on regularity and that of a gastroenterologist when one is having constipation. A dermatologist should be consulted for weight gain and an endocrinologist, on the other hand, in case of itchiness. Do not dismiss these symptoms as a failure to diagnose and treat correctly may diminish your physical health and happiness.

Fallopian tubes be­come swollen, an illness name­d salpingitis. Aching in your belly with fever plus we­ird discharge may occur. Untreated se­xual infections or germs often cause­ it. Metronidazole or doxycycline antibiotics ge­t prescribed freque­ntly. However, if those me­ds aren't helping, tell your doctor. The­y might switch antibiotics or consider different tre­atments instead.

Experiencing clitoral pain after urination can be due to various reasons like urinary tract infections, irritation, or yeast infections. To address the issue consider using mild, fragrance free products. Practice good hygiene, and avoid irritants.

Worrying about pregnancy is normal. Pre­-ejaculate can sometime­s lead to pregnancy, but chances are­ lower than regular ejaculation. Missing pe­riods, nausea, exhaustion, and sore bre­asts indicate early pregnancy symptoms. Taking a pre­gnancy test from drugstores or clinics provides clarity. It's wise­ to eliminate doubt. If not pregnant, using prote­ction during sex consistently preve­nts unintended pregnancie­s and sexually transmitted infections.

The pill reduces the chances of pregnancy, but it is not 100% effective. SSo there is still a risk of pregnancy. Its difficult to determine the timing of ovulation and fertility. please condult your doctor for evaluation. 

You might have premensstrual symptoms nothing to worry about.But if you are worried, I suggest that you visit a gynecologist for an evaluation and diagnosis.
 

Yes the pain and burning sensation is due to irritation from the soap. Soap can sometimes cause irritation and disrupt the natural balance of the sensitive skin in that area. If this happens just rinse the area thoroughly with clean water and avoid using any harsh soaps, fragrances, or other irritants in that area.