I've had lyme disease. I had it when it was almost unheard of, and they didn't have a test to determine what lyme disease was. 
Deer ticks transmit Lyme disease. If you have deer around you, you have deer ticks, and you can get lyme disease. Deer tick are VERY tiny. They are about the size of the head of a needle. If they are on you a long time, you'll have no problem seeing them.
If you have a bite from a tick that appears like a bullseye, get to the doctor. Tell the doctor you want a lyme disease test. If a doctor won't do the Lyme Disease test, either insist on it, or find another doctor who will. 
Here's the reason why I say this....I have always been an outdoor type person, camping, hiking etc. My friends shared my same love for the outdoors. The 3 of us all had Lyme Disease. 
One of my friends had to go on a respirator because the disease attacked his central nervous system. He could no longer breathe on his own. Another friend had to have her hip replaced. She walks with a cane to this day. The disease attacked her joints, and disintergrated her hip joints to the point she almost had none left. 
And me, I was luckiest out of the 3 of us. I was sick, but it had not progressed as far as it did my other two friends. I was very ill though. I would be so tired, and sleep 14 hours a day, and still not be able to get up out of bed. That is so NOT like me. By the time they figured out what was going on with my two friends, they immediately hospitalized me and had me on A LOT of antibiotics. I was lucky. My friends recovery was more painful, and I always felt guilty of that. 
Please don't mess around with tick bites. Especially if you see a bullseye, and don't even see the tick. Get a test done, and insist on it if you have to. Ticks can transmit a lot of diseases, but Lyme Disease is curable if caught early. It's better to be safe than sorry.
Bluemoon