I think i got a cold sore, i had never had one before and idk how i could have gotten one. does that mean i'll keep getting them in the future?

You don't know: This might have been your introduction to the virus, but probably it was there for a long time dormant before showing now. If you have had it only a week, a blood test will answer the question because the blood test will not become positive until after at least a week. In case you experience significant recurrent attacks----too soon to know----there are pills which are very effective.