erika, in my own experience, DD who was bf hardly ever projectile vomitted. The only time she did was when she was unwell. Sounds like Bryn might have a little bug, so keep an eye. But try not to panic too much. Reuben has a bug too and he has vomitted a few times in the last couple of days, although not projectile. It is really unpleasant, but I assure you, you will not sleep through it if he is sick in the night. Your mind, your instincts and the sound he will make, will all wake you instantly. Reuben was unwell in the night last night and I woke before he was actually sick each time. If, however, you are at all concerned at any point, call your out of hours gp for some advice/nhs direct. Do not wait for your mother to advise, just do it and then talk to her. Your mum is being really really unhelpful. What you need right now is support, a shoulder and some practical advice on how to deal with a newborn who is vomitting. .
I shall tell you about the first time DD projectile vomitted. She was, i don't know between 6-8 months, still in our room, in her cot. It was around 2am, she had a cold, and feeling sorry for herself, was awake fussing and it was DHs turn to get up and fuss her, check her temperature, settle her, but her cot was by my side of the bed so I was right next to them both and was awake with them. He was completely naked, sat on the bed, cuddling and shhing her, and I sat up and was talking to them both too. Then she gagged a couple of times and DH was like 'what is happening?' and before i could respond, she threw with great force, all over him . She also got me, all over my arms, it went so far, but mostly, it got DH. Not a drop on her, apart from a little around her mouth and chin I have never seen him run so fast into the shower going 'ew, ew, fucking hell, ew!' Leaving me with child, messy myself and the duvet to change! I laughed my ass off, as DD looked so much happier after it too!