highly unlikely. I'm sending you a private message.
False positives are extremely rare, and usually only happen due to expired tests or waiting to long to read the test. I'd say 5 positive tests are a good indication of a pregnancy.
This definitely requires confirmation via blood test from your doctor. I don't believe that cysts or pre-menopause should alter your hcg levels to mimick a pregnancy.
I think it would be highly unlikely to have that many false positives unless there had been a chemical pregnancy.