Hello
I had a look at your chart. This is my analysis:
1. First, your query regarding Kulla Daivam cant be answered from your horoscope. Kul Devata is one, who has been worshipped by your ancestors (father, grandparents, etc). Sometimes, Gram devata is also Kulla Devata. For that kindly ask your elders in family.
2. From Horoscope Isht Devta can be told.
3. Your 5th house (Mantra bhava, also house of Mind) has Rahu in Scorpio. Rahu is devotee of Goddess Durga.
4. Regarding your health problem, 8th house is house of hudden chronis diseases, your 8th house has Shani (Shani is planet related to chronic diseases).
8th sign Scorpio has Rahu (Rahu shows difficult to diagnose diseases and autoimmune disorders also).
So, Keeping in mind all these factors following remedies are advised
a. Regularly pray to Bhagwan Shiva Parvati – go to temple on every Monday and offer
water to Shivalinga. Sit there and pray to Shiva Paravti from your heart.
b. For Rahu one very strong remedy is to pray to Kaal Bhairav or Maa Kali. This
will pacify Rahu.
You are undergoing Rahu mahadasha which is of 18 years. It started in 2014 and will be till 2032.
Hope this helps
Om Namah Shivaya
Dr Sandeep Bansal