Ok, Tiger...first of all, pause. Stop. Take a step back.
Now take a few deep, slow breaths.
You are panicking. What is happening here, is catastrophising. It's OK, it's very common with anxiety, totally understandable and we all do it sometimes. You're not broken, you're just scared - and your head is on high alert, looking for threats.
Here, have a hug
...and keep breathing.
Now, I know this will be hard to hear and hard to believe, but:
You are not qualified to treat or diagnose this. You do not know what the problem actually is, only a dentist can tell you that. You do
not know that the implant is failing. That is the anxiety talking.
Please stop poking at it, and stop putting stuff on it!
You need to go and see them so that they can tell you what is going on and give you the information you need, to allow you to make a properly informed decision. If you do this sooner rather than later, you will be able to get your head out of this horrible place. It's the kindest thing to do for yourself.
Always remember, they are on your side. They are not out to harm you, they are there to help you. They've done a lot to take on board your needs and adapt where they can, they certainly care.
Take a look back over this thread - there have been a few occasions where you were absolutely convinced that the worst thing was going to happen - but it didn't. What you can take from that, is that no matter how convinced you might be, it doesn't always turn out that way. This could well be another of those occasions.
Honestly, you've been doing so well. Really!
This is such a huge thing to go through, and it can take it's toll both physically and mentally. Be kind to yourself, seek help, and get the answers (from your dentist, not from the internet!!) Then you will know exactly what you are dealing with, and can make your decision based on what's really going on.
You will get through this.