I have itchy red bumps on my stomach, breasts, arms, legs, and neck. What could these possibly be?

Might be bed bugs.  They are on the rise.  Have you traveled anywhere lately? Live in an Apartment complex? I hope for your sake they are not :-(

Have you been checked for topical sprue?? Maybe look up the symptoms for it. Good luck figuring it out!! 

I have the same thing going on with me. Extremely itchy and irritating.I went to the ER after about a week of dealing with it. They diagnosed me with pitarysis rosea. It is a viral infection that lasts for 4-6 weeks and goes away by itself. It is not contagious and not harmful. I am not 100% sure that the diagnosis was accurate because I do not have a Herald patch(a large red circular rash on trunk area that the rash starts as), but I do have several round rash areas on my thigh along with a sprinkle of rash all over. All I know is it is driving me nuts and it gets worse daily as new spots form. Hope this helped you.