sounds like theres 350 cickets under my hood.
new water pump, new belt, new alternator. maybe the tensioner?

How long has this sound been happening? Has it gotten worse over time?

One of the first things I'd check are all the pulleys. While running look to see if any of the pulleys wobble or seem out of alignment. With the engine off, remove the belts and spin each pulley to see if they spin freely or may be binding.

only for about 2 weeks now, it just began to do it

Follow Echo'* advice above. But do one belt at a time first to isolate which belt path has the problem.