Needs someone to kick my butt!

I realized that even though I made it to the gym today for the first time since my surgery. I did not do everything to the best of my ability. I felt I fell short today. I was disappointed in myself! I went ONLY 20 minutes on the damn elliptical and couldn't go anymore! GRR I hate how hard this is to stay motivated! I believe I need my pt there to help kick my ass and keep on track. But he's busy so I should be able to keep myself on track! It's tough! How do I make this easier?! Can I take a pill that makes it all better? GOD please give my strength! I need to get healthy for my future!