Welcome to HealthcareMagic Forum.
Your description has no mention about the treatment you underwent 2 weeks back. Was it complete? If not I suggest you to get Stool microscopy and stool culture. This can help the doctor to know the cause of the problem.
I personally feel that this can be a enteric fever
or infectious diarrhoea
which is easily treatable. The other option is Irritable Bowel Syndrome
for which LFM (life style modifications) can help a lot.
All the best.