A few months ago while I was visiting family my cousin decided to lock me out of my phone by putting in the wrong pattern 30 times. I was then asked to provide my Gmail account and password to unlock it. However, when I input my Gmail account and password it says "Invalid username or password". I wasn't able to do much searching there since their internet was very unstable and rarely worked, so now that I'm back I checked and the Gmail account and password that I entered are correct, it just happens to not work on my phone. My WiFi and data off too, so that could be the reason why it's not verifying it.
When I turn off my phone and turn it back on while pressing the volume up button it does say that it's on fastboot mode and that it's unlocked. Not sure if there's any other information that I can provide that will be helpful. I really want to access my phone again without having to factory reset it since I've a lot of pictures that I haven't saved and I don't want to lose all my contacts again (not sure when I last backed up my phone or if I have ever backed it up).