Pesticide health concern. Please help?

Yesterday afternoon I had pest control out to spray for bedbugs in my apartment. I waited 3 hours as told before going inside. I couldn't stay the night the fumes caused a headache. Today I'm back and now I get very drowsy. At some point I fell asleep at 10am after waking up at 8am. I woke up again at 1pm. Could this be a problem. Should I be concerned? Can pesticide do this?