2012 MacBook Pro running extremely slowly with constant color wheel

Question

I have a 2012 MacBrook Pro and yesterday it randomly began to function extremely slowly and has almost a constant color wheel. This does not just happen when on the internet, but happens with any function of my computer. Even the typing is lagging.
The following information might be helpful in attempting to find a solution:
-All of my updates are up to date
-I have tried turning off my computer and restarting it a few times, including trying it in SafeMode and there was no difference.
-My computer has never done this before.
-I did not have an abnormal amount of activity happening on my computer when it began to function extremely slowly.
Anyone have any ideas of what could be happening and how I can fix this?
Thank you!

Answer 1

Are these typical problems that happen when there are problems with a startup drive or another hardware component?
Yes.
When the slowdown is especially bad, note the exact time: hour, minute, second.  
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.