Thank you very much for all the details and your patience.
It seems like an episode of Viral
Gastro-enteritis which usually takes around 5-7 days to settle down and your symptoms are already decreasing in frequency.
You do not have any complicating symptoms like fever,abdominal pain or headache.
Weakness ,as you said is mainly due to water and electrolyte deficiency.
All you need is to take ORS regularly with plenty of fluid. Around 3lit/day would a good regimen.
No anti-biotics are needed in most as these are self limiting episodes.
You can have soft diet.
ORS is the mainstay of treatment.
If you develop any of the symptoms which i asked then you may need to make an appointment with physician.
Please feel free for any follow up query