I BEEN ON THE SHOT FOR 4 MONTHS I THINK AND I RECENTLY HAD TO TAKE AMOXICILLINFor a Sinus infection I had... Durin this time of taken them my period came on... It stopped tuesday morning and I had sex wednesay night!!! I totally forgot about it effectin the bc methods... What r my chances and also Im scheduled for my depo 12/12/13... Help me please... 2 kids already and my youngest is 6 months