Trey - the injured pup

Our little pup, Trey, injured his paw just over a week ago. We took him to the vet and they stitched it up using subcutaneous (below skin, dissolvable) stitches and bandaged it & gave him an e-collar (cone). He was put on antibiotics and anti-inflammatory/pain relief pills. We removed the bandage 1 1/2 days later, as directed, and left the cone on until his follow up visit. Tuesday morning (yesterday) we took him in for his check up and he was doing pretty good. They removed the collar and said to put it back on if he bothered the wound. He ignored it for several hours but the kids and I went off & Corey was in a class and Trey started licking it. Last night it was looking more open than it had before and I was worried. So I scrounged around the house and found 1 large bandaid. So I applied antibiotic ointment and the bandaid and wrapped it with strips of fabric in a makeshift bandage. The fabric came off on his first trip outside but the bandaid was still on. Today I had planned to call the vet but got busy...ugh! The bandaid came off this evening and the wound was even more open than before...looking like the stitches busted. :-/ I am not a happy puppy mama. We washed it with warm, soapy water (as directed) and put a clean sock on it...but are having trouble keeping something tied around it to keep it on. I'm having trouble making sure the tie is tight enough to hold it on but not too tight for his leg. Frustrating and worrisome. The split open wound looks painful and thankfully he still has anti-inflammatory, pain relief pills. Calling the vet in the morning is an absolute *must*. I don't like the thought of any of my babies being in pain or not feeling good and this is what is bothering me the most about all of this. I'm not so worried about an infection because he's on antibiotics and we are keeping it clean. *sigh* It is hard being a mama...of kids or animals.