Medical Termination of Pregnancy.

I am 7 weeks & 3 days pregnant. I went to an OB GYN for my abortion options & she suggested Medical Termination Procedure. I took my first tablet yesterday at her clinic & she has given me second set of 4 tablets (Misoprostol) to be taken tomorrow morning orally (all 4 to be taken in 2 min intervals with water). My concerns arise at the oral method. I have read a lot about this online to prepare myself for tomorrow & majority of the medical reports that I have read have mentioned vaginal insertion, under the tongue or between the cheeks & gum method as most recommended. I do not want an incomplete abortion to happen or go for D&E if this fails so I want to do it the right way & with most effective method. So is the oral method recommended to me correct & equally effective as others? Considering my stage of pregnancy? Please help.