I posted once before and this is still going on, every two weeks Ive been getting a single bite in the morning it appears, its like nothing Ive had before, it comes up in a red welt almost a half inch across with a red dot in the centre, really itchy for a week, then slowly fades after a week, its not like a flea bite or spider bite. I suspect a bed bug, but can you have only one bed bug? This is been going on for months and only one bite every 2 weeks, dont these things bread and infest? Its always around the ankle too. Ive tried taking the mattress out into the sun for a day and washing the sheets in hot water and it still comes back. I also cant see any signs of dried blood on the sheets. I have researched the net for all the signs. Cant find a thing. Also i havent slept in any hotels. What else can i do?