Please eat nutritious food and hydrate yourself sufficiently.
Include lots of fruits in the form of juices or whole.
The weakness will gradually improve in the next couple weeks.
Also walk for atleast 15 mins everyday,helps prevent bloating.
Rest as much as you can,take afternoon naps too
Gradually you'll start regaining energy.
Continue the multivitamins you were using in isolation for the next few weeks too.
Next Steps
if you have any questions or need help, consult a physician online