Hello, I Recently Started A Cycle Of Anavar. I Was

Hello, I recently started a cycle of Anavar. I was on for 20 days, I stopped for 8 days and then went back on it for the last 5 days. Now my period is 5-7 days late.... so I took 3 pregnancy tests today. 1 read negative, 2 read positive. Could my cycle AND the results of the tests be thrown off because of the Anavar. Btw, I am not planning for pregnancy, but my boyfriend and I did have unprotected sex 2 weeks ago.
Please advise . Thank you