In my book there is no such thing as failing.
Congratulations on day 75. That is amazing. And very strong and tough of you.
It's ok to go through sour and bitter emotions during your recovery.
And don't forget the rest of your life is recovery, and you have the rest of your life to make things right with anything that bothers you.
Try not to over-analyze things and learn to ignore and block out negative thoughts all together.
Keeping a positive mindset isn't just some thing you do, it's some thing you live.
This time of feeling like a failure will pass, just keep on the bright side no matter what and live in that instead.
And when it comes to anxiety, fight it with all you have and do things that you want to do anyway, regardless of anxiety. Just do it. Anxious or not. Be your anxious self, if you must. Anxiety always proves to be a loser in the end, you will see. And half the battle of overcoming it, is to stop listening to your anxiety and negative thoughts. Treat them as you would an intrusive thought and stop taking them seriously.