Inconsistent Masquito Bites

Yes, yes, I know, any bite beyond Masquito people point to bed bugs or mites - but I'm sure my problem is masquitos - because it is fairly humid here, and even removing standing water from my property won't do me any good, nor do the screens because I do NOT live alone, and other people insist on having the back door open so that cats can get in and out without annoying us. The cats are on monthly treatment for fleas - and mites have already been removed.

However, all summer I've been getting a moderate amount of itchy bites, but there have been some different ones on my legs, and only legs. My mother says it's probably allergies to the masquitos, and I know they can occur suddenly, but I have some masquito bites that are 'normal' and then some turning almost scarlet at the same time - if it were allergies, would they not all be worse than normal? Most of my bites are red and raised, and slowly fade into my skin colour. However, these ones have a very sudden contrast between skin and bit, and one of them is entirely dark red, not raised, and painful as well as itchy, while the other ones on my legs are not as dark (but still fairly red) with a yellow center (but not pus filled), and ARE raised significantly more than the rest of my 'normal' bites. The texture on the raised ones are the same as the skin around them, but it feels hard underneath when I press it. The non raised one is level with the rest of the skin around it, but has an almost waxy feel to it.

Er to sum that up in point form, to make it more comprehensible
Normal bites
-itchy
-slightly raised
-reddish pink, gradient to skin colour
-Normal skin texture

Bite #1
-itchy and stings
-not raised
-Dark dark red, doesn't fade to skin colour
-Slightly waxy texture

Bite #2
-Itchy and stings
-Very raised, bump feels hard when pressed
-Abrupt bright red with yellow (non pus) center
-Normal skin texture

Could it just be the cusp of an allergy forming? Or perhaps it isn't masquitos? My brother has been making all sorts of theories that are very unlikely, but nonetheless scary. I normally wouldn't bother anyone about it and just use my head, but it's just because they are so different from the usual bites I get this time of year that it uneases me. I'd rather sit here and type up a question now than wait the two or three more weeks for another appointment. Thank you for your time and patience in reading this.