Help!! My betta fish is sick or going to die soon I think!!?

Well, I'm afraid that tomorrow morning I'm going to find a dead betta fish in my tank because my betta is just sitting at the bottom of the tank, looking lifeless. He is not lying on his side or anything. I've also been noticing that during these past few days, he has a short and thin white strip of skin going down his head, and most of his face looks more whitish'. It looks like it is hard for him to breathe because he is breathing with really deep and exaggerated breaths. He also looks bloated and it also looks hard for him to swim around, especially swimming upwards to get air or eat. In fact, he only moves when he swims up to the surface for some oxygen. Even when I made some loud noise or movement, he didn't react to it at all!! My betta is a fish that gets scared really easily and now, its like he's deaf! Actually I don't even know if fish can be deaf...do they even have ears? well never mind. Please, please, please, can anyone out there on the internet please help my poor betta fish?!!? Every time he goes up for air, he comes right back down to literally lye down on the bottom of the tank again!! He just looks so lifeless and I miss the fish that was so energetic and spazzy!! On a side note, I am heating the water right now but that does not seem to be working....hopefully it will work later on though. I even tried giving him some food but he didn't even notice it!! What should I do and what do you think he might have?