I already begin losing steam

When I decided to get pregnant I also decided to make good choices in regards to what I put into my body and taking care of my body. However, that was 3 months ago. I was going to the gym at LEAST 5 days a week, gave up caffeine, and refused alcohol. Since NOT getting pregnant Ive become frustrated and its showing up in my habits. I would rather eat tacos then go to bootcamp, drink coffee and soda all day instead of water, and have had WAY too many mornings hungover lately. I need to refocus. Next week all my clients go back to school and my schedule will certainly be more steady than its been in a long time. I need to readjust where I am at in life. I still plan on running the 1/2 marathon in Decemeber so I need to make sure I am training hard. I still want to lose about 20lbs before getting pregnant so I had better do that NOW. Maybe the baby is waiting for me to get where I want to me before it comes. Maybe my body is saying "you arent ready yet, quitter! Prove it!"