Congrats on 2 1/2 months!!!
Exercising is a great way to keep the gloom and anxiety down! I was pretty much a ball of those two for a long time when I got sober. Pushing myself in a work out almost took my mind off of it sometimes.
I have really leveled out now. However, I still feel better when I get a work out in. Just like eating healthy foods gives me more energy. None of us are as young as we were when we started using. We have to accept that we will never feel like we did before.
I was lucky to have it as an outlet when I really needed it. Craving, run until you can't. Crushing boredom while my mind healed, push ups to failure. That was under 10 at first.
It may be a chore to you now but it is well worth it. You're still pretty early in recovery. Give yourself time, you will get better. You are doing great!