There was a tiny black bug stuck on my leg this morning?

Ok, so ironically, I have been horrified by all this “Bed Bug” news lately and did some reading on it yesterday and looked at a bunch of pictures thinking if I was more educated about them I wouldnt have any problems. I have never seen anything like it in my life. Anyway, that really has nothing to do with my question. I woke up this morning and I was folding laundry and I had an itch on the back of my leg, behind my knee in that crease. I scratched it and it got worse so I looked at the mirror behind me and saw a TINY black spot, so i scratched at it and it didnt move and I got a little nervous. I really thought it was just a bee stinger stuck in my leg so I pinched at it to pull it out.. and when I did, it came out and I thought all was good, then I looked at what I pulled out and it was a little tiny red/black bug. My dog was just treated for ticks, but taking care of him I saw quite a few ticks and it did resemble a tick, but it was a whole lot smaller than any I saw on my dog. And I had just looked at bed bug pictures and it really did not look like any of those pictures I saw. But now on the spot on my leg, its very swollen and itchy. I don’t know if there are any dangers here? What else it could have been on my leg? What I need to do now? Any help would greatly be appreciated!