Found small deer tick biting at my hip in the shower. Only a few hours after a dog walk. Left small red spot and bug was notengorged. Need antibiotics?

Annoying ticks. Fortunately it sounds like you caught this tick before it could cause any infectious problems (such as Lyme etc). This is because ticks operate rather slowly and the germs it might have had would not get mobilized right away. I suspect you have a small localized reaction to the tick saliva (similar to a mosquito bite). I expect that to go away. If, however, a target like rash appears- see doctor.