I saw one bed bug a week ago, cleaned the carpet, put encasements, etc., examined bed and mattress, flipped them upside down, sprayed with isopropyl alcohol. I haven't seen any since but in the past 2-3 days, small red dots appeared.
I know one day while waiting at the bus stop I was bitten by a fire ant and another showed up on my arm. The two bites I definitely know were from the ant look very similar actually but I thought from online posts they're supposed to be pus-filled in the center.
These are just red spots. Pics :
http://tinyurl.com/nz5sj8c
http://tinyurl.com/nl7avf6