Hey my period is 5 days late , I have endometriosis first of all. So for me I always have pain and especially when expecting my period I took a pregnancy test today and it’s positive. However. I took Benedryl last night and online it says antihistamines can cause a false positive. Has anyone heard of this ???? My boobs hurt extra than normal also If anyone has heard of this or had it happen I would appreciate anything you could tell me thanks