Exhaustion, dizziness After a 'stomach Flu'

I've read some of the other posts in this forum regarding similar symptoms- and nothing sounds very promising.

Late last week I had what I can only assume was a bout of 'stomach flu'- but like most things health-related, since the same symptoms can indicate several possible ailments- who knows whether it *actually* was a stomach flu or just a case of food poisoning?

In any case, after a few days, my stomach symptoms began to subside, but since then I've been fighting exhaustion, weakness and vertigo (dizziness and lightheadedness). I've deliberately taken it easy- drinking LOTS of fluids (mostly water, but have switched to a sports drink (Gatorade) periodically in an attempt to replenish electrolytes, and getting plenty of rest- as much as possible anyways (gotta pay the bills somehow). The stomach is still occasionally shaky- but I don't think it's necessarily related, and the symptoms are nothing like they were late last week.

I've dealt with prolonged bouts of exhaustion and vertigo before- last year around this time I came down with something that left me feeling largely the same as I have been this past week- and it was only until after the new year that I felt that I *began* to recover from it. At the time my 'doctor' assumed it was the flu- or perhaps an ear infection. Nothing seemed to give me any relief. This year I deliberately began taking vitamins (Vit.C) and supplments (Garlic tablets) to try and prevent getting ill again- and it seemed to be working as I was feeling fine (with a few minor exceptions) up until last week.

I'm not sure whether it was indeed the 'stomach flu' that caused this. I've been under a tremendous amount of stress lately- and I don't handle stress well. We had our apartment flood with water (nothing too serious, but enough to cause a disruption) twice in the past few weeks, had to replace a part in the car which cut into the finances a fair amount, plus we're leaving in a few weeks for a family vacation- which one wouldn't imagine would be stressful, but it's been a challenge getting our finances in order to cover our obligations before we leave (I've also been at my job just over a month- so I don't qualify for vacation pay, which puts some of the pressure on too).
Sorry- I'm rambling.

In any case- does any of this sound familiar to anyone? Any suggestions of what it might *actually* be or how to find some relief? I mean- when you have aches and pains (something else I occasionally have had over the past week) you take Tylenol- when your stomach is upset you take Pepto- but what do you take for lightheadedness or fatigue (besides rest- which sometimes isn't an option- and hasn't done a lot for me either... I've been getting plenty of rest, but wake up feeling rotten and like I could go right back to bed for another 8 hours)?

Thanks,

- skubik