I used Bitcoin in 2011 and 2012 to acquire ... questionable pharmaceutics.
I stop using, but I have no idea how to log on and check to see if my account still has any value. Is there a website I can check, a way to see if I still have funds to spend?
You need to give us more details about the investment. What problems are you facing while logging on in your account ? There will be options like resetting the password and that requires you to have access to the email you used for registering the account on that exchange. If nothing works, try dropping a mail to the exchange with all details.