Where can I get support from my college?Watch
anxiety and depression wise, you can tell your GP / doctor and they will give you the help you need whether that be medication/ CBT / therapy etc etc.
police / getting sectioned / informing parents does not happen unless they feel as though you are not in the right state or able to make a decision for yourself.
i hope you get better over time and stay positive ! i am always here for you if you want to talk.