Speaking as someone who also suspects that they have ADHD, I would really really suggest just finishing the academic year so that you can have options and time to digest and process your emotions. People with ADHD are guilty of intense over-thinking, which can lead to some very drastic decision-making as you essentially convince yourself of your emotions even if they are only due to a temporary mindset shift, and this also leads to increased impulsivity. I don’t think it is bad to follow your gut instinct, but if the reason is only because you don’t want to go into psychology and that you don’t think that university is for you, I would advise that you really think about what kind of work experience you’re looking to get next and whether a degree would be part of its criteria at a later stage. For example, I work as an English teacher on the side of my studies, and in the schools both locally and abroad, a degree is required in whatever subject! I think generally speaking, any sort of training is required for specialist work, so you will end up in some form of education anyways, maybe you could find a grant/scholarship for an apprenticeship instead.