First of all, you should be able to look at the needle and see if it's bent.
If it's bent back in the shaft, you may be able to bend it gently to straighten it. If the very tip is bent, get another needle.
But.......
It's more likely that your brush is clogged with paint, and your paint needs to be thinned. That's a mistake I made when I first started. If the paint is too thick, or if it has particles that are too large, like some hobby paints, it clogs the tiny holes the paint passes through. There are four tiny holes in the nozzle that can get clogged pretty quickly.
Also, you may have paint dried in the outer part of the nozzle itself, and you can clear that by using a soft bristle brush to rotate around where the needle comes out. Be sure to rinse the face afterward.
If the brush is clogged, here's what I did and still do.
I found that, first off, I needed to soak my brush tip in some acetone, and spray some through the brush, and then back flush with the acetone, to get the clogged paint out. I took out the needle, wiped it down, dipped it into the acetone, and put it back in. I put some more clean acetone in the paint cup, and moved the needle back and forth, using it to clear any paint that was in the passage. Then I pulled the needle back a little, and sprayed acetone through the tip to clear any clogs that got knocked loose.
Once you get the brush cleaned, thin your paint with whatever thinner the manuf. recommends. If you use Createx, you can use their airbrush cleaner to thin the paint, or just clean water. But don't over thin it, or it will lose it's film strength.
I use some Apple Barrel paints, which are thick, and I thin them with Windex.
I try to get the paint to be as thin as skim milk.
There are folks here who are a lot better at this than me, and they may have additional advice.
Good luck.