Incomplete abortion. Orally with water?

Hi, I'm 20 yr old women, on January 21st 2017 i had a medical abortion when i was 7 weeks and 6 days pregnant, i had bleeding for 2 weeks, then from Feb 12th till today i have brown vaginal discharge (spotting), so today i went and consulted a gynecologist, she did a Transvaginal ultrasound test and found out that there is still some bits remaining in my uterus, so she said me to take the misoprostol pills again and also gave me antibiotics to prevent infection, but i have 4 misoprostol pills (Brand of the abortion kit: Unwanted -by mankind), so i'm confused whether to take all the misoprostol's or just take 2 tablets bcos its just some bits remaining in my uterus, coz i'm worried what if i over dose myself by taking all the 4 misoprostols... But in other way, i'm thinking, what if again it doesn't completely abort if i don't take all the 4 tablets... And please suggest me how to take the pills? 2 pills at morning and 2 pills at night? can i take it orally with water?