I'm sorry she's getting worse.
If possible, get 300mg Calcium Citrate+D3 into her in case she's having troubles expelling an egg or lash material.
You're noticing the swelling is getting worse as you speak, over the course of a day. I fear that this is not a good sign. It can be hard to know what's causing the swelling, whether she's internally laid, has some infection from lash or EYP. Could be the digestive system, fluid...so many things.
With her being unresponsive, take great care in getting anything into her. I'd also try drops of sugar water (1tsp sugar to 1cup water) to see if that brings her up a bit.
If the swelling is getting a lot bigger, it may be worth trying to see if any fluid could be drained to give her some relief. Draining can be risky and cause them to go into cardiac arrest so you'd have to use your judgement on that. Ideally before draining a bird needs hydrated, but most certainly afterward.
Either antibiotic could be used, but since Amoxicillin has been started, I would stick with that. Dosing is 57mg per pound of weight given orally twice a day for 7-10days.