hi doctor !... I had my marriage on 23rd april n my last periods in on 12th april...I have taken to pregency test first on 19 may n 2nd is on 24th may ...both are negative ...but still I didnt get my periods ...my doctor recommend me for the deviry drug for 5 days twice a day ..shud I take that or I shud wait for the periods to come naturally...does this drug have any side effect for future pregency?