Hi I'm 3 Weeks Late On My Period I Took

Hi I'm 3 weeks late on my period I took 4 home pregnancy test and all were positive. Like two or three weeks before my period should've come the doctor gave me the BUTAL/ACETAMN/CF AND AMITRIPTYLIN 25MG I only took them for a few days but I was wondering if is because of that that my period hasno come