Poor thing, that sounds rotten. The really nasty infection I had a few months ago caused both lids to swell up, I looked like I'd been punched. My actual eyeball got all puffy too as it filled with fluid
The GP said the conjunctivitis (ie redness and soreness) was probably caused by a virus which it was why it was quite resistant. I probably caught it as ds had a bad cold at the time and was really snotty, and I was probably not as good with the hand hygiene as I should have been, probably passing it in to my eyes after I'd been wiping snot away from him.
Anyway, the optician across the road from me said the eye drops are good, but the best thing you can do is bathe your eye in saline every hour for 24 hours. You'll need an eye bath or something similar (an egg cup?) and some saline, which you can make up from cooled boiled water with some salt added. Just put some in the eye bath, place the eye bath over your eye, tilt your head back and open your eye. It will sting, don't make the saline too salty, but it works pretty well too.
To try and reduce the swelling, after you've done the eye bath, wrap an ice cube in a flannel and put it over the whole eye area for about 15 mins. Make sure you don't share towels and flannels with anyone in the family, and maintain good hand hygiene.
HTH