My baby two months old and when she's feeding she gulps fast, spits it out, starts crying and seems disatisfied but still eats momentslater. What's wrong?

Bottle or breast? If bottle, check the mechanics of the bottle first to see if she's swallowing air. Don't heat the formula in a microwave, as that can cause some really hot spots. Try a bottle that has a bag from which you can express air, creating a vacuum like she'd have if nursing. If breastfeeding, check her " latch." if the problem persists, let her pediatrician watch her feed.