Adam was quite bad in the first few weeks. I thought it was normal but it turned out that he had reflux. Keep an eye on her, and monitor when she is sick. If there is no improvement it might be worth mentioning it to your HV or GP. It can be difficult to get it diagnoised.
Please don't worry as it is normal for a baby to vomit quite alot at this age.
Adam still vomits quite bad every other day even though he is on Gaviscon Infant and it tends to get worse when he has a cold.
I think that a baby can over eat, and will just bring up any extra after a feed. Adam can projectile vomit an hour after a feed too, so I know it is his reflux.
A Thing to try might be keeping her as up right as possible after a feed. It didn't stop Adam from being sick, but it did help a bit.
Let us know how things are going. xxx