Zoloft and exhaustion

I have been on Zoloft (150mg) as well as Wellbutrin (300mg) for the last year. I have been on Zoloft for nearly 6 years (for postpartum depression and then ongoing depression) and the wellbutrin was added in by my doctor 2 years ago when the depression symptoms seem to be returning. However, during the last year, I am tired ALL THE TIME - really tired. The kind of tired in which I feel like I can not function. I nap any chance I get (which is difficult because I have four children) and still have no problem falling asleep at night. I have been to the doctor and have had blood tests to see if my exhaustion can be attributed to anything but my test always come back normal. So I am now wondering if my tiredness is a possible Zoloft side-effect... And is it possible for it to be a side effect that surfaced several years into using this drug? I did not feel like this when I first began either of the medications. I also wake up nightly completely soaked with night sweats... another Zoloft side effect. If anyone has any similar experience or advice, I'd love to hear!

Those of you that has experienced weight gain....do you think its because the Zoloft as increased your appetite? I can handel being tired and going to the bathroom all day... but I would be in worse shape if I gained weight....what else is more depressing!! My husband started Zoloft a few weeks ago for anxiet, and his main complaint is exhaustion. My OBGYN gave it to me for severe PMS.

Best of luck to everyone here....