Major hair problems.help me ladies.

I have wavy curly hair and once a week i oil my hair nice with castor oil and coconut oil and let it sit for 24 hrs and next day before shower i comb my hair and there are like strands of hair all over...so much hairfall that it makes me cry😕even after shampoo they dont look nice...i dont use any harmful products on my hair and still my hair are going thinner and thinner...i think i ll go bald in a few weeks😑