What Are The Chances Of Pregnancy Having Taken Deviry Tablets?

hello doc,

I m 30 yrs old female, having a 3 + yr daughter. My last month period was on 17th sep 2011. Since due to some reasons like long periods( periods last by 7 to 8 days with very heavy bleeding) and other reasons i wanted to postpone my periods of october month a little later. SO doc gave me deviry 10 mg tablets to start from 15th oct to 27th oct. ( 12 days). I stll havent got my period yet and my pregnancy test at home shows very confusing too. I m scared if i m pregnant. Can i conceive while consuming deviry tablets too.