DONUTS ARE EVIL!!!

OK so I am on day #3 of being a single parent and I am not adjusting to it very well. Today I had to change my daughter's eye appointment because her glasses are falling apart and she needs new ones. So we had to be there at 8am. Now normally I would have taken her and hubby would have taken care of little man or vice versa but I had to get up at 7am then get both sleepy/grouchy kids awake and dressed. So no time for a nice breakfast but we were on time for her eye appointment. We left and went to get a donut because I told them I would get them something to eat. We went to the donut shop that was close and went in to see the selection. Do you know there is NOTHING healthy about a donut shop! I saw my favorite sausage roll, chocolate donuts, cake donuts, blueberry ones, etc. I was in heaven and just the smell was refreshing! I let the kids pick out their donuts and they got a big chocolate milk to share then it was my turn....I looked all over and chose the chocolate devil's food with chocolate frosting and a small chocolate milk. I know, I know.....bad choice. Now about a month ago I could eat a donut and a sausage roll and a large chocolate milk for breakfast....I know it was awful! After being on this low calorie diet for 2 weeks (almost 3 weeks now) I thought I could splurge and get a donut and drink chocolate milk. Now what I did not realize (remember) is that there is a LOT of sugar in both of these things and sugar can make you crash HARD. So I came home from taking the kids to school and normally I stay up and enjoy my quiet time or workout and shower. Well today I watched Ellen and fell asleep...until it was time to get little man from school, that is 2 hours mind you! So I jump up and pick up the boy and come home and then I sat and watched a movie with the boy and made lunch for us. After the movie I realized I had done NOTHING. So I changed into my workout clothes and left Preston to play on the computer while I went to the torture machine. I stepped on and started going and about 10 minutes into my walking/jogging/elliptical workout I felt weird. I was shaky, sweaty (different than workout sweat), couldn't get into my rhythm. It was very awkward so I got off after 15 minutes because I was afraid to go further in my workout. After I walked around and caught my breath and drank lots of water I felt better but that was a strange feeling. I still felt tired the WHOLE day even after my 2 hour nap and laziness today! So I made sure to drink lots of water and eat low sugar today. I felt better later in the day and night and I wasn't as tired. I have learned my lesson and I will NOT eat that much sugar in the morning...or at all....and I will stick to my healthy breakfast from Dr. Oz! So tell me your thoughts about the pitfalls of healthy lifestyle changes!