I don't know what to do she has never done this before. After throwing up her food she has been almost gasping for air while gagging on nothing and its starting to scare me should I take her to the vet can anyone help me out

Sounds like she swallowed something that she should not have and is trying to get rid of it. Take her to the vet for an examination. Explain the symptoms.

I wouldn't waste any more time.

I agree with Tickle. Don't risk it. We can't tell you what's going on, but if it were me I'd be rushing to the vet. It's always better to be safe than sorry.

Please let us know how it goes, and how she's doing.

Good luck.