I feel like such a bad mommy..

I'm just now doing a heart worm test on Harley.. he went this morning.. they said they'll call me by next wed if it comes back positive and no call if it's negative but I told them I would call anyway out of nerves probably. I know I should have started him on heartworm preventative a while ago but I just kept forgetting but I don't know why.. I'm so worried.. What if he does have them?? I'm going to feel soo guilty.. When they brought him back out he had two of his legs wrapped up bc they said he wiggled so much and cried so much that he pulled the needle out of his front leg on the first try! Poor baby..

I just took his wraps off a couple min ago and he seems fine and not in pain at all.