Everyone makes mistakes. Just know that you aren't alone.
Mistakes can be BIG or mistakes can be small.
Mistakes come on different forms.
Some mistakes can eat away at you. They will haunt you forever. No matter what you do.
No matter what happens, don't let those mistakes eat away at you. They are a small part of your life. The important part is that you move on, learn from it, and forgive yourself.
If you think a bad mistake you made will be there forever in your life, it probably will. But if you forgive and forget, that mistake will be like a demon being washed away.
Don't let something little ruin your whole life for you. You have so much more to live for. You don't need a little thing to drag you down.
Never forget that you are amazing no matter what you may have done.
Just remember that a mistake may have lasted a week-a year of your some 80 years of your life. When you put it to scale, you have a long time to be a better person.
But the only way you can be a better person is if you forgive yourself, and move on.