Can Pre-ejaculate Cause Pregnancy?

before inserting ,while trying to wear condom i observed that by mistake i was rolling it in opposite direction.there was some precum. which would have now got stuck to the outer part of condom which actually comes in contact with vagina.But since i observed it,i immediately removed it and washed and cleaned the outer surface of condom.. and rolled it in right direction and then went ahead with insertion. Was this act unsafe ?height : 6.2 ,age :24,weight:78.medical history:no