Welcome to the forum.
It is very important to use a password you can remember, buy not something that others would guess. Next time write you password on the back of something you always carry with you. Like a card listing your medications or something like that.
Meanwhile, we recommend that you contact the manufacture of the computer for the best way to reset the password. How to do this depends on what method was used and what computer you have and some other variables. Using the wrong method could result is lose of data or even making the PC dysfunctional.
Of course, that does not always happen, but I would not want to take the responsibility of causing you lose something that is very valuable to you and would cause you pain.
Contact the maker of the PC and provide the serial number and model number. In most cases they will not change you for the information if you provide a return e-mail address. And you may need to give them some addition information, such as a where you where you bought the computer