Quoting jethro: I've already been through the ringer, and I still have got a long way to go ...
... so the only way to go is up ...
3 weeks of DBing will not cancel out 16 months of He!!
It took 16 month to create the hurt that pains you, but now she is working to clear the air so there can no longer be anymore hurt between you. It is only fair to say it is going to take much more than 3 weeks to heal 16 months of hurt, but the pain will fade.
Your tired because your mind has been working nearly 24/7 on processing your emotions. Jethro with the busy agenda this weekend, try to resist your mind from wanting to back to processing. Come up with that mantra to stop the thoughts. Repeat it over and over to keep your mind working on something different for a change.