Getting new freckles and moles at a startlingly rapid pace?!

I used to have a few moles (not raised and not very big, more like large freckles- smaller than a pencil eraser) and a few freckles here and there. I would have maybe one freckle on my hand, 3 on my chest, 2 moles on my back- spread out like that and very few. I am 25 now and over the last year I have suddenly gotten many many freckles and moles all over my torso. I'm having a hard time distinguishing what is a freckle and what is mole because of the odd variations in size... none of them are raised, but they vary from a tiny brown speck to a mole that is smaller than a pencil eraser and every size in between. There are also some "moles" that look like they may be just 4 or 5 freckles all right next to each other. It doesn't look weird yet, but it is startling to me because I've never had freckles like this... I could always point out my "freckle" or 2, but that was it. They are now all over my back, all over my stomach, all over my chest, and I'm starting to get them on my arms and legs now. This has all happen in 1 year, so I am very afraid that if I continue to get new ones at this rate, I will have terrible looking skin in a few years. I haven't been in the sun in the last year, so if this is sun damage, it's not recent sun damage. I've had a lot of problems with my skin lately (over the last year) with it suddenly becoming terribly dry and having strange rashes appear on my eyelids. I guess the main thing I'm thinking is that there is a problem that I can't see that is causing the sudden change in my skin and the problems I've suddenly had with it. Does anyone know if there are any conditions, diseases, etc that would cause skin problems that you have never experienced before?