false positive and ovarian cyst...

Re

I went to the hospital Wednesday for abdominal pains 6 days before my period they said I had an ovarian cyst on my left ovary they did a test and it was negative, today 4 days before my I took a test and got a faint but obvious positive. my mother told me that an ovarian cyst can cause false positives, is that true? if so how likely is it to actually be a false positive? I was happy until my mom burst my bubble