If No call your father and explain him that "Ok dont accept me as your son just give me some amount so that I can start my career and I promise I will not indulge in your personal life again".the way you explain your story is like your father is a very rich man..he wont mind giving you money..
As if you are sure that you are not his biological Son then you ll be wasting your money and time and ultimately you will lose the case.