Throwing up/Spit up

So in November Colton was 4-5 months and he was diagnosed with reflux. We took him BACK to the doctor because he was allergic to the medication (zantac) and his doctor said to put cereal in his milk (along with the enfamil AR) and if that doesn’t work to try this new medicine. Well the cereal worked so we didn’t do the medicine.

Well now Colton is 13 months and for the last week he started throwing up while milk. Well we thought he was lactose intolerant so we put him on almond milk. Everything was fine but then he started throwing up everything he ate.

I’m going to call his doctor tomorrow but I’m a bit confused. Can reflux come back to life this late? It’s absolutely everything he drinks or eats he throws up. I’ll put a few pictures of what I have. Lately it’s been pretty clear or whatever he just ate but I haven’t gotten pictures. Today he’s thrown up at LEAST 5/6 times.