Does indigestion make anyone else feel tired. Somedays I feel fine, but somedays I feel lazy and tired. Was wandering if my indigestion could contribute to that. I'm 23 years old and work out 3 times a week

Absolutely!
When you can't digest food properly, you are not taking in nutrition correctly. It almost like not eating, except your body is working. You should try to figure out what causes your indigistion, like certain foods, quantities of foods, etc. Things to try would be digestive enzymes and probiotics. These can help put your system back in balance.

I am actually feeling constantly tired, but I dont know whether it is due to the reflux problems, or the Nexium I am taking...