I have been suffering from extreme fatigue for months now and i expeirence wheezing and a build up of phlegm constantly in my throat. my breathing is also heavy and i wake up exhausted all the time.

Get seen soon!: It's hard to say what is going on. We don't have enough information. However, it's certain that you need to be checked out thoroughly, as soon as possible. There's something wrong, & if you don't find out what, it may get worse & worse, & harder to fix or control. In the meantime, don't smoke & avoid alcohol & recreational drug. Also, no fragrances or aerosols which cause/worsen lung disease.