Help my babys dying

Here's a few pictures of my plant. its 2 1/2 weeks into flowering, its in a pretty small pot, looks pretty root locked, and the leaves are turning yellow then falling off. If anyone has any idea whats wrong with my baby please let me know asap.

For one transplant to a bigger pot.

Your pot is way to small. By the looks of the plant its been in that pot longer than the roots wanna be. Your root are so bound up they are locked out but by your description in your post you already know that. So that being said I dont understand why your asking if you already know the problem or maybe I dont understand what your asking exactly.

Transplant that girl ASAP man! Your N is getting locked out hence the yellowing and curling of leaves. What nute system are you using?

botanicaire pure bloom pro

like everyone has already said, transplant to bigger pot....leaves curling upward is usually a ph problem, so I am gonna guess too much fertilizer or something along those lines unless your water is just way off on pH that you are watering plant with.

I agree that you need to transplant. You need to monitor the PH as that could cause a lockout also. I've noticed that leaves sometimes will start to yellow due to the low amounts of nitrogen which is normal when you switch to bloom nutes. Also, what kind of light are you using? Leaves will yellow if they don't receive proper light. Overall your plant looks healthy, but you really should transplant into a bigger pot. Bigger root system = bigger buds.

Alright thanks i just re-potted my plants hopefully that should help. The roots didn't look very locked though, someone said it could be something about the nutrients I'm using? I'm using liquid karma, and on 1/4 strength flowering nutes.

What kind of lights and what's the temperature and humidity?