Keyboard key was delayed at first, I toyed around with it, and now it repeats?

So I have a macbook pro and the issue is with my "h" key. First it was delayed, as in when i tried to type something like "the", it would write "teh" instead, so I googled it to try to fix the issue. I don't remember *exactly* what I did, but it was something along the lines of turning "key repeat" in settings to off, and I think something else. Anyway, the key is no longer delayed. Instead, it repeats now. For example, now if I try to type "the" it writes "thhe" even when I press the h key only once. I'm getting very tired of having to press the backspace because of this. I never had these kinds of issues with other laptops, but i repeatedly have issues with my mac. The issues seems to randomly appear and disappear. I had the same issue with my "n" key a few months ago, and it randomly stopped. Now it's with my h key. What's going on, and is there a way to fix it once and for all?