Another way of saying it is:
My whole body is covered in mosquito bites!
Do you have a telephone number or an address where I can reach them? (can is more natural than might)
October 7, 2015
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I would remove the word 'over' from the first sentence.
Also I would rephrase the second sentence in the next way:
Do you have an address or telephone number to reach them?
October 7, 2015
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