you don't have to do anything you don't want to.
If you feel supplimenting is needed I would suggest a cup, finger feeding, or even SNS.
Also when they throw up it'll look like more coming up then there actually is.
With him not having any other symptoms my first thought would be either Reflux, or Allergy. Have you tried an elimination diet at all? keeping in mind that it can take at least 2 weeks to get a food out of your system compleatly. Most likly if its an allegy it's probably milk.
Both my girls had reflux. My first I FF due to many many issues stacked against me. She was like yours in the first few weeks. She was also FtT and that was even after she was FF and they knew how much she was taking. She would often projectile vomit and it looked like her entire feeds, but really when they do that, because there is so much mucus, there isn't as much milk as you think. If you want an idea dump an oz of water on something and see how much more it looks like. LOL you might be suprised. She was started on reflux meds and was able to start keeping down her feeds.
DD#2 was so bad that she was also having trouble keeping down food and she was BF (minus 3 days of FF due to some issues I had) with her though I knew what it was right away. I was able to get her medication and she stopped over night. Once she was feeling better (cause reflux does hurt) she would eat more often, she went from 3-4 hours to 1.5-2 like she should have been.
If you are concerned about your supply then pumping can help (and you can use that to suppliment instead for formula
) You can also try herbs like Fenugreek or blessed thistle, and there is also Domperidone (thats what did it for me) When you do pump, feed first then pump and it'll encourage your breasts to make more milk. (supply and demand)
Don't give up on youself. Its extreamly rare for a mother to not make enough milk. I would even say call the WIC LC back and reschedual. They will be able to help you out so much. Find a support group near you of other nursing mothers. You DC is still very young and there are other things that you can have checked first. I would hate for you to give up and then find out it was something you could change and that you can BF after all. There are so many things you can do before you give up. Is your pediatrition BF friendly?? if not then you should either find another one or find someone who is so you can have the support you need.
Is there any BF support groups there for you at all??
Oh and don't let anyone tellyou if you pump and you don't get much milk you don't have enough. A pump is no where near as effective as your baby. Most moms can't pump very much.