I have a newborn and she doesn't usually spit up often but tonight she is waking up every hour trying to get sick but swallows what does come up and than has trouble breathing
What could be wrong?? And what should I do??

If she's throwing up and having trouble breathing then you need to take her to the hospital.

This is your call, you're there, and you know your baby. You know if something's not right. If you feel that something is wrong then go to the ER.

Good luck.

She only has trouble breathing when she is swallowing what spit up does come up
Could it be her formula?? Or maybe an upset stomach causing her to be getting sick??

Are you hurling her properly during each feeding? Try feeding her upright and keeping her upright for 30 minutes after each feeding.

Is she throwing up her breastmilk/formula or does it look like something else?

You are putting her on her back to sleep aren't you?