How did you know you were getting better?

I've been home sick since October 1st with Epstein-Barr. I thought I was getting better about a month ago, went to work for 2 days then crashed hard.

Some days seem okay, sometimes I can go outside, drive to grab food or do a really small errand, but almost always I end up paying for it and crashing.

I have really limited what I do, spending as little energy as possible, but then I will have a few good days and think to myself, "okay.. are we rounding a corner.. or is this another false sign of improvement?"

For those who feel like they have completely or mostly gotten better, what were the signs that you could go back to work? What signs did you have that you could resume your normal life? I am so afraid to jump the gun and put myself right back where I started again like I did a month ago.