Stress causes. Is it true.

I have mental stress from last two months. My family members are scolding me. And my parents not treated me like their daughter. Every day saying "go from this house, live anywhere in hostel" It is so painful for me. younger brother also not treated me as a family member. He is doing job. i am job less no income from me for my home.. i went number of interviews. but i am not selected. and i am not getting right job yet. All of this i am struggling mentally very much.. Day by day i am decreasing weight. My present weight is 44kgs. and not healthy also... So finally, this mental stress is cause for my weight loss.........? is it true...? Is this my weight loss reason.......? If i don't have mental stress like this, will i gain weight......?