I know it's difficult to make yourself like something, but making yourself like it and look forward to it helps too. Getting stressed in class because you find it difficult to understand can in turn make it even more difficult to understand and lower your attention span, express your worries to your teacher and perhaps inshallah try to arrange some extra tuition time. If your teacher gets unhappy about it (like some teachers can do for various reasons, time constants, underpaid, etc) take it up with the department head, because to them it should prove that way that you aren't slacking, you genuinely want to learn. They'll typically give more time to someone who is interested and struggling than to, say, someone who is not interested and struggling, or someone who is interested and doing well.
Asking the school/college/university to see an educational psychologist might help because they can help identify where the gaps are in your learning and if there is any fundamental information or understanding that you're missing that they don't teach you in class. However some institutions won't get an educational psychologist in because they cost too much, or only for testing of learning difficulties. No harm in asking though, and at least if they test you for a learning difficulty, even if they don't find one you still get a report detailing where your strengths and weaknesses lie. If they do find one, the school or institution is obliged to give you extra help and extra time on assessments.