Problem with bedbugs is that once they are your friends it's very hard to get rid of them.
You probably stayed at one place and got them, and now they are following you around! They lay eggs, and these eggs may be staying with you (in your clothing, sleeping bag, ...) for up to eight weeks until they hatch. And then they feed on your blood whilst you sleep. Very often it looks like a rash. Other people get bits similar to mosquito bites almost in a straight line. Other people get bits at certain areas on their body e.g. ankles, arms,...
The only thing that helps is extreme disinfection of everything including your clothes and luggage, by now probably your bedding/bed frame/mattress at home (but they even live in/underneath carpets and so on...)
Depending on how bad it is it might be just enough to wash all your stuff extremely hot (add boiling water to the machine!). If it is really bad you might have to get somebody professional to look at your house. Or move ;-)
Good luck!