successhalf, are you sure that the password is not saved anywhere, is there at least a 1% chance that you wrote it down? Also, if you remember the first password, maybe the second password is similar in number of characters and their type which could help you try brute force.

Is there a possibility that it is a password with some predictable words, numbers from your everyday life? 2016 wasn't that long ago, your best chance is to take a piece of paper and a pen and try to write down all the possible passwords that come to your mind by comparing the ones you still remember from that period.