I recently had my first genital herpes outbreak 3 days ago (still going on) and my doctor prescribed me acyclovir 500mg 5 times a day for 10 days. Ive been on my birth control nexplanon for about a year, its august and i have not had a period since october-ish, its pretty normal that i dont have my period, because of the birth control however today i got my period. Is it possible that my period came because of the acyclovir ? Or is it just my birth control ? I am also taking Flagyl-Metronidazole for BV for 7 days twice a day. Is it possible all this medication is causing my period ? If so, will it cause my period to go away as well when i stop taking it ?