J.W.
If the head were still in there, you'd know it. It would be a bit swollen and red and you'd probably be able to see it a little bit. Unless it was a deer tick, because they are soooo tiny. Was it normal size or teeny tiny?
I have dogs and deal with ticks on us and the dogs all spring and summer and fall. The best thing to buy is a little plastic item called Ticked Off. You can buy it at many different places and they even have a website explaining it and how to use it. www.tickedoff.com. Now last time I posted a link it got pulled, so hopefully this will make it through, lol.
You always want to be careful that you don't separate the head from the body. I know their icky, but don't panic when you see one. I have several of these Ticked Off tools, all over my house and in my Jeep. One in every room! So I don't have to go running around like a crazy woman when I need one. Put it in a baggie before throwing it out. I don't flush them, I have nightmares that they will just swim back up, ewwwww. Lol. I wrap them in a paper towel and then put them in a couple of baggies, and then throw them away. Can you tell I hate them? <shudder>