Its not always easy to just "go see a dermatologist"
Have you changed face washes? Has your diet changed at all?
You said your 19, are you at school? Sometimes a change in water can have an effect, i break out when i come home from school on breaks, i think is because of the water.
Stressed? Different foods? There are a ton of things that can be causing you to break out, and one thing cold simply be hormones and such. Try some OTC stuff, 5 pimples at one time doesn't seem that bad, you might be able to just use OTC products. If not, i'd see your PCP or a dermatologist if you can, they should be able to give you some perscription topical meds