It’s movie where a guy turns into a vampire and is struggling with being hot and travels around with his friend, who told him he’ll turn into a vampire, to find a cure before he fully transitions and is confused. I think it’s kinda’ like a virus. I also remember that the guy is found in bathtub or something. They’re in a desert like place. I think the movie was made in 2000’s, but I’m not sure.
The Forsaken (2001)?
It is this one! Thank you so much!
Afflicted (2013)?
https://www.imdb.com/title/tt2309961/
Solved! It is THE FORSAKEN.
Thanks Alex!