I woke up from my nap with a swollen eye

I woke up with an intense feeling of burning sensation in my left eye and I started to rub on it frantically. Just right after 2 minutes, I realised that I can see something from the corner of my left eye and feeling rather uncomfortable. I went and have a look to notice that there is this small little bag on the white side, look like water - retention on it. 

I kept using Optrex to wash it to stop the burning and uncomfortable feeling. Right now, it is no longer burning but still a little bit itchy at the swollen part. I can still get a peep of that swollen thingy at the corner of my eye. So weird the feeling. 

If it get worst, might need to visit doctor tomorrow. Hope it goes off by tomorrow. 

Am still putting lots of Optrex & Eye-Mo on it. 

Actually that swollen type quite big.