Hello, Thus Past Saturday I Went Primitive Camping And Everything

Hello, thus past Saturday I went primitive camping and everything was fine, but I got home took a shower and noticed a tick on th foreskin of my penis... Got it completely off head and all and it was fine. Today I noticed It was swelling the right side pretty good, to weird to go to a doctor, can you help me. What it is ? Why it's swelling ? What do I do ?