Is it my obligation to shoulder all the burdens?

ouch. you're in a painful situation. but i understand if you're puzzled right now. you love your parents and siblings and you want to help them in any way you can. however, you feel that you are already burdened, right? you do have a life, too. and you should have time for yourself. it's not that easy to not take care of your family's financial needs especially if you're so attached to them. and you feel like it's bad for you not to take care of them. however, you should try and talk to your family about your situation they will atleast help you in any way.