Could this be some type of allergy?

Just to give you a little info.
I have been having this problem for about 3 years now, and its that somedays I just wake up and I randomly have extra large lips. Its like they’ve grown over night. It really itches at the edges. Last time I had this happen to be which was around 3 weeks ago, I went to the doctor and he told me that maybe it was just some herpes I had in me that pops out every now and then. But now again I woke up like that; actually it happened last night, I was eating dinner which was salmon and rice. As I was eating I started feeling itchy on my lips and I stopped. Then today as I woke up they are really swollen. My mum is thinking of taking me to a skin doctor but i am also starting to think that its maybe the fish. But then last time this happened I didn’t eat fish.

What could be the cause of this and I wish I had a picture to show you… there’s even some water coming out of my lips.