Can my 2 year old be allergic to almond milk but not to almonds? he eats them daily no reaction, tried almond milk and vomited 3 times right after,

Unlikely: If your 2 year old had a true IgE-mediated allergic reactions to almond this allergy would manifest with both almonds and with almond milk. Given your concern and consistency of reaction I would have your child avoid almonds until seen by an Allergist for skin or blood testing to confirm/deny allergy. An Allergist will be able to get to the bottom of this.