got drunk and people have said i had sex

Hi,
Welcome to ehealthforum,
If you have not had periods after your last ‘normal’ periods, and if it is true that you had intercourse, then chances of pregnancy cannot be ruled out. Urine pregnancy test (UPT) kits are calibrated ones, so unless the hormone levels in urine reach a certain level, they do not show positive results. They can also show false negative results. Blood/serum HCG level estimation is accurate. UPT should always be done on early morning first urine sample as the concentration of pregnancy hormone HCG is believed to be highest in this sample. Look out for development of any other new symptoms suggestive of early pregnancy.
If you suspect to be pregnant, consider visiting your doctor/gynecologist at the earliest for further examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Take adequate rest. Drink plenty of water. Maintain healthy diet.
Take care.