Is this an emergency?

So my 3 year old ate hummus and his tongue has spots on them and he keeps saying it hurts. He had the same symptoms and we went to the doctor and he said give him hummus after 8 months and see if he has a reaction again or not. Well he has and I’m scared it’ll turn into anaphylaxis. I’m watching him closely and he seems okay and he ate it like 30 mins ago.