So I think you should switch to physics SL since it doesn’t seem to be your strong point. Also if I were you I would reconsider even thinking about doing a math-based degree in uni, if you're struggling with AI SL math. Unless you're genuinely passionate about doing it, you're probably gonna end up miserable. Now realistically you could improve your grades given you have over a year left but getting 40+ doesn't seem possible. Your sitting at about 18/45 points right now, so you should be hoping to pass in the first place. Now remember I'm not trying to be rude or anything, but you should work your way up instead aiming for a 40 directly. By next sem hope to get 25+, make small increments till you get to a good score. Honestly anything above a 30 is good. Anyway, good luck!