New moles daily?

I have always had moles but for the past few months I've noticed a dramatic increase in the number of new ones. I take the proper precautions when outside (sunblock) but am not outside that often. For the past two weeks I've been monitoring myself and have noticed new ones daily. No specific area they appear all over. Most are black in color a few are brown and most are fairly small but some are medium sized and they are all flat and not really irregular shaped. Im 23 years old and I'm just curious if developing this many moles so quickly is serious.

Any help is greatly appreciated!