Hi everyone! I'm new to this forum and betta fish care, so please do be patient with me. 
I bought my second betta fish (I had one as a small child) approximately 2 weeks ago. He was very good for a few days and seemed very happy in his tank. I came home one day and felt the water temperature for the first time since his first water change and it felt way too cold. I thought that it would stay room temperature, but I sleep with a fan on and it chilled his water. He had been acting a little strange (not swimming around much, spitting out his food, staying in corner of tank, etc.) before but now he seemed almost lifeless. I frantically ran out to the nearest pet store and bought an appropriate heater for his tank along with some freeze dried bloodworms. I also went online and purchased a well recommended food since I had been feeding him cheap pet store food, not knowing they were picky.
He gobbled up two bloodworms while I did another water change and stuck the heater in. After some research I thought he had a swim bladder, and I read that it would go away after a consistent water temperature (78F). It has been about a week since I purchased the heater and he still has swim bladder symptoms.
When he got used to the water he would swim to the bottom a little, but he still stays in the corner of the tank for 90% of the time and keeps his body in an "s" shape with the end of his body looking bloated. There is no discoloration in his body or fins, but he isn't wanting to eat any pellets (both brands) and I don't want to overfeed with bloodworms.
Please help me keep my fish alive! I was super excited when I got him and I am already attached to him. ): I appreciate any answers!
I bought my second betta fish (I had one as a small child) approximately 2 weeks ago. He was very good for a few days and seemed very happy in his tank. I came home one day and felt the water temperature for the first time since his first water change and it felt way too cold. I thought that it would stay room temperature, but I sleep with a fan on and it chilled his water. He had been acting a little strange (not swimming around much, spitting out his food, staying in corner of tank, etc.) before but now he seemed almost lifeless. I frantically ran out to the nearest pet store and bought an appropriate heater for his tank along with some freeze dried bloodworms. I also went online and purchased a well recommended food since I had been feeding him cheap pet store food, not knowing they were picky.
He gobbled up two bloodworms while I did another water change and stuck the heater in. After some research I thought he had a swim bladder, and I read that it would go away after a consistent water temperature (78F). It has been about a week since I purchased the heater and he still has swim bladder symptoms.
When he got used to the water he would swim to the bottom a little, but he still stays in the corner of the tank for 90% of the time and keeps his body in an "s" shape with the end of his body looking bloated. There is no discoloration in his body or fins, but he isn't wanting to eat any pellets (both brands) and I don't want to overfeed with bloodworms.
Please help me keep my fish alive! I was super excited when I got him and I am already attached to him. ): I appreciate any answers!