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....

Menstrual cycles take almost a year or more to normalize after pregnancy and breastfeeding. Please visit your OBGYN and get an ultrasound to see if there are any adhesions which might cause often/irregular bleeding.

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.