Hi Rooney,
Assuming it's just one tap and not the whole house, the first place to check is the aerator. That's a little filter-like device designed to break up the water stream so it doesn't splash. If your water system has a lot of minerals, they can build up over time and block the aerator from being able to pass water through.
Bob Vila (you know Bob Vila - everybody knows Bob Vila!) has a nice little article on cleaning your aerator here.
[link|https://www.bobvila.com/articles/how-to-clean-faucet-aerator/|How to Clean a Faucet Aerator - Bob Vila|new_window=true]
Once that's done, come on back and tell us what happened. Did it get better, or are you still having the problem even without the aerator installed? Is it particular to the hot or the cold line, or both?