I agree with ggreg. It sounds as if you have some type of parasite causing your problems. Going to the doc. and getting checked is your best bet. You can spend a small fortune otc and still have reoccurring problems. A doctor will be able to give the best advice as to what is wrong and how to treat it. Best of luck to you.
Sissie
I may be totally wrong, but it sounds like you may have a case of lice or scabies or some other little bug that likes to invade human skin. They bite, crawl, leave bumps where they've been, but usually you cannot see them very well, and depending on what bug it might be, it can drive a person nuts.
So, you will have to go to the college clinic where you go to school, let the doc check out these places that are bothering you, he'll probably do a few skin scrapings and look at it under a microscope, and then he'll know what medicine to give you to wash in and some pills, and it will go away. In addition, if it turns out I'm right, when you leave the doc office, go home and wash all your sheets and clothes in very hot water and detergent, dry them in a hot dryer, because the bugs will be on whatever was close to your skin. You can also vacuum the rest of your house, using the extensions to run over the couch and chairs, around the sides of the bed and under the bed, and then throw away the vacuum bag or contents of the cannister in a tightly closed plastic bag and put it into the big trash outside.
If you are absolutely against going to a doc about this, you COULD go to the local pharmacy and check out the lice killers, scabies killers, whatever miniature bug lotions and washes you can find, and treat yourself... but over-the-counter stuff doesn't work as well as real stuff from the doc, plus you may pick the wrong medicine. These things happen, often to college students, since they are always in very large groups, or they bunk four kids to a room, or nobody ever cleans up, you get the picture, so don't feel bad about it, just go to the doc.