Why is my period 18 days late with body pain, white discharge, and negative urine test?

It's quite natural for some mild spotting to occur after intercourse, especially towards the end of your cycle. The dark brown spotting you got could be some of the blood from earlier times coming out. It is nothing to worry about, and it sometimes occurs when your body is getting used to the birth control pill. It will probably pass away by itself in a little while. 

It's unlikely that your fiance is pregnant Birth control pills alter hormone levels, which can cause lighter periods. However, if you're still concerned, take a PREGNANCY test or consult a doctor Remember, birth control pills are not 100% effective at preventing pregnancy, so it's important to use additional PROTECTION if you're not ready to conceive. 

Yes definitely it is possible for a pregnancy test to show a positive result while you are approaching your menstrual period. Pregnancy tests detect the presence of the hormone human chorionic gonadotropin (hCG) in urine, which is typically produced during pregnancy. You can confirm it with another test or urine pregnancy test.

Yes dp spas is mostly prescribed for menstrual pain. 

Beyond 20 weeks pregnancy terminations is not recommended. If you still have any doubt it's critical to visit a gynecologist or an obstetrician for the process and medical services required. Self-medication or attempting a home abortion without a doctor's supervision is not recommended. 

Itching and discharge could me­an a yeast infection. A common issue, causing irksome­ itchiness, thick yellowish gunk, and sometime­s bump too. Ove­r-the-counter antifungal creams can provide­ relief. Kee­ping clean and dry down there also he­lps. Drink lots of water, and wear breathable­ cotton undies. 

Radiation is neither dangerous nor harmful to an unborn baby when the mother's stomach is well covered during pregnancy and X-rays are taken. The child was probably well protected by the lead plate covered by the pelvic region during the X-ray. In general, radiation obtained from a single X-ray is so low that it cannot make an early pregnancy harmful. Nevertheless, telling the doctor about the X-ray and pregnancy is always the best choice. They might wish to examine the pregnancy more often to make sure that it is developing properly. 

There is nothing to worry about the white discharge as it is completely normal in teenage girls.Hpwever if the discharge is accompanied by other symptoms such as itching, etc you need to see a doctor for treatment.

A faint line on a pregnancy test can sometimes indicate a positive result. In many pregnancy tests, even a faint line can suggest the presence of the pregnancy hormone hCG. A faint line could mean that you are in the early stages of pregnancy, as hCG levels might not be very high yet. So it's recommended to take another test after a few days to see if the line becomes clearer.