Thanks for the query.
Faulty positions sometime can cause backache
So while sitting always take some support to back. Use calcium tablets which will strengthen the bones can reduce the pain to some extent.
Some amount of white discharge is common.
Usually during ovulation, just before and after periods increased vaginal discharge
can be seen.
If there is no associated features like foul smell, itching, pain abdomen etc no need to worry.
If any of these symptoms are there better to consult gynecologist once.