Hello, I got a short shank low port bit for my new horse because her tongue is so big it bulges out the side of her teeth quite a bit and I wanted to give her tongue relief. However, I am training on the barrel pattern and wondering if it is okay to use that bit? Do any of you run in low ports?

Depends on the design of the rest of the bit. If you've got "movement" in the bit, then it's okay for the direct reining barrel racing requires. If it is totally solid bit, then that is not a good choice because that's intended for neck reining and more advanced horses.

Can you post a picture of what you haave?

a port is a nice option for a horse that leans into tongue pressure. The sides give the same feel as a single break snaffle but the port lets them adjust their tongue how they choose. I just moved a colt into this bit. This colt was getting a little head heavy with a single break, tugging a bit. This port keeps her from feeling the need to pull back on pressure and she has lightened up nicely. Hasnt been intimidated at all by the port and likes the feel.

https://www.google.com/search?q=connie+combs+port&rlz=1CDGOYI_enUS883US884&hl=en-US&prmd=sniv&source=lnms&tbm=isch&sa=X&ved=2ahUKEwithtOB__zqAhWLZd8KHZ1gBBoQ_AUoA3oECAwQAw&biw=414&bih=610#imgrc=DWZ2p-E3Z5X8YM

Each side moves independently. :)