Can we start other liquid like daal ka pani or khichdi ka pani to 5 months old baby?

No, but. Cancer during pregnancy is not an uncommon thing but cancer itself rarely affects the growing baby directly. The cancers that tend to occur during pregnancy are also more common in younger people. These cancers include - Cervical Cancer, Breast Cancer, Thyroid Cancer, Melanoma, Gestat....

you had periods right after your delivery? what was the date after delivery when your period started?

You should avoid drinking during your periods. Your body is fatigued and already experiencing a lot. If you drink, the chances for a heavier flow increases and will make you more uncomfortable and uneasy. So, try to avoid it.