Student finance and help as a student

Hello! I’ve recently decided to go back to university! I’ve got student finance and I was trying to look for any other things I could apply for to help me while at university. The only problem  is I’m not diagnosed yet, my diagnosis was supposed to be this March but... Y’know... Life got in the way! So without a formal diagnosis I feel like I’m stuck! Does anyone have advice on what to do/ who to contact? I’ve applied for university, but I haven’t got all my replies yet, still waiting for one to reply before I can pick a choice! I want to contact the university to see what help and support they offer but I feel like I can’t do that until I’ve made a firm choice and I feel a little helpless in this in between stage!?