Hello Doctors, I Recently Took A Few Pregnancy Tests Of

Hello Doctors,
I recently took a few pregnancy tests of different brands just to make sure to get the best accurate results. Well i got most negatives but i got one positive . I freaked out because at the moment i dont want to have a child.. Then the next day i got my period. But then i was throwing out one negative pregnancy test so i checked it out and it was positive. Ive always been irregular with my periods. Now im freaking out because i dont know what to think about all the pregnancy tests i took.. Can you please help me distinguish this situation?