Red, itchy, bug bites?

I've been getting red itchy bumps on my legs, mostly on my right leg. It's been about two weeks and I have about 10 or more bumps. They itch especially if irritated or if rubbed on something. When I first started itching my leg I noticed one of the bumps I scratched started to blow up and looked kind of like a blister. It was filled with a clear liquid and become a sore about 1/2 - 1" big. I have 2 more sores on the leg all below the knee. I think it might be a bug bite, not sure tho or if it is what kind of bug. I washed my sheets and dirty clothes and vacuumed my room. Not sure if I'll have to see a doc soon. Please help me if you know or have ideas what might be causing this.