Hyperventilating!!! Terrible mom

I feel like a horrible mother, I feel so bad and I am scared like crazy.

I have a 16 month old. Today while coming out of the park she tripped and fell for a bit. They were cleaning sewage nearby and I think I saw a brown tire mark near where she landed on her hand. Anyways she didn’t cry much. I picked her up and brought her home and asked my MIL to wash her hands while I used the washroom. I should gave done it myself but I have fractured my left wrist and am in cast and it’s difficult to wash her hand and hold her with one hand ( it’s not an excuse, I should have done it, but I just thought my MIL cab do it). I come back see my DD eating potato fries and licking ketchup off her fingers. I asked my MIL if she washed her hand and she was like I didn’t hear you and I thought you had washed her hands. I freaked. I washed her up immediately and threw away fries she had touched and got her new ones.

But I am freaking out now thinking what all bacteria and microbes were stuck to her hand and what all she ingested with that dirt, and mud and sewage remanent if any in those tire marks. I am so scared and I can’t stop crying. I called her doc and he said wait and watch but I can’t stop hyperventilating...