Let go of the mentality, I think this is actually quite good. I think learning mathematics needs to be rigorous, every question needs to be carefully thought out, and every detail needs to be carefully thought out. Don't be said by others, and find suitable reasons to convince yourself.

In your present state, I think there may be the following shortcomings: first, it is the end of the term, and I suddenly think of these problems and feel a little overwhelmed; Second, the habit of careful reasoning has not yet formed, and thinking has no direction.

My suggestions are as follows: your situation is normal now, no matter what others say, you are actually a little more suspicious than others; Gradually cultivate strict thinking habits, learn analogy, and must use their clear knowledge without hesitation; Learn to put the problem aside for the time being, think slowly when you have time, and remember that this is someone else's conclusion when you use it, and you have not confirmed it yourself. Some things you can't get satisfactory results now; But after a few years, you may gradually feel that the problem is getting simpler and simpler.

I hope it will help you, and I wish you progress in your study!