I'm 18 I have two reasonably sized what feels like swelling in my throat I have asthma and acid reflux disease, please could you help me?

Tonsils? Do you mean the 2 lumps at the side of the throat usually called tonsils? If they are suddenly enlarged, be from an infection. If your stomach content reaches up to the throat area, then it may cause irritation and enlargement of the tonsils (i must admit that I have only seen this effect on the lingual tonsil which you would not be able to see without a scope but not the pharyngeal tonsil.