Lumps All Over My Body?!

Today 7th September 2011 i have come out with 33 and counting lumps over my body: face, feet, back, arms and tummy (noticing i have none on my legs). They first started at about 10AM and have continued to appear throughout the day, at first i thought they were mosi bites however they don't have the bite whole like i normally get as well as some being in funny shapes for example ovals and lines, as well as being all very different sizes. Some have suggested heat rash as i had a high temperature but not sure if this is it ? They are itchy, very hard, but when i itch nothing comes off, like flaky skin with normal bites and weasng. Not sure if this is just normal bites but they dont seem quite right to me, especially as its in the space of 6 hours and 33 have appeared. I have two lumps by my eyebrows with are more invisible than the others, not sure if this is just because of the area. I am nearly 16, i have also changed outfits completely just to try and see if there was a bug in my other clothes but more have been discovered since then. It has been a normal day temperature wise, not hot, not cold. Used an ice pack to try and cool me down and have taken paracetamol. Feeling a little dousy, tired and itchy. Any suggestions on what this may be and what i can do to help is much appreciated!