Too many ticks!!

Samson had a great time with 'grandma' and 'grandpa' Sauder while we were away in Colorado. He got to spend some time in the woods & came home with many ticks! These things gross me out!! At first we just thought he had two and we gave him some tick medicine. We gave it to him and those two ticks died and fell out. He had to go to the vet for some other shot so the vet also pulled out 4. Well we've been pulling out 5+ every day. He must have had at least 20 by now!! Most of them are the size of the two largest ticks in the photo. I really hope we've gotten them all off of him because I don't know if I can take it anymore!!!!