First of all, the biggest mistake most Muslims do these days is that they don’t even know that who they are, and what is their purpose of life. You are property of Allah, you are made by Allah, For Allah. Your purpose in life is JUST to live this life in accordance with teachings of Allah (Quran) and not by your own whims and desires. Of course you felt bad that you had to leave your passion, career, fashion modelling, all these type of things are by all means 100% Haram in Islam.
Islam does not stops you from going and persue your career and passion, but ONLY, if it is in accordance with rules of Islam, otherwise a Big No. So always remember that before you were born, you were nothing, Allah gave you whatever you have, your life, your body, your beauty, your everything.
And just imagine, the creator who gave you this body, will you MIS-USE it and make Allah angry (by going into the dirtiest industry of Fashion and modelling? where women are treated as JUST objects? and only Filth?? degrades women below level of gutter)...
Believe me sister all of us get very upset that why certain actions are haram, but in the end, when some people dis-obey Allah, then they do know some time that if you will ever go against Allah, then obviously you will face serious consequences. So please try to know your purpose of life, and stick to it. Otherwise you will be among the losers.\
May Allah guide us all