Eating splurges & Weight maintenance

I am no longer trying to loose weight, I am trying to maintain, and I couldn't find a maintenance thread, so sorry if this is the wrong place.

This past month has not been good for me, I have been stress eating and bored snacking. It started off with a little bit of sweets a few days in the weeks of this month but recently in the last three weeks I have eaten out at least once in each of those three weeks.

I am moving from my hometown in a few days I wanted to eat at the places I won;t be able to eat at again, even if I haven't been there in years. For old times sake, but now I am feeling overwhelmingly guilty. The first two eat out meals I ate was a "rip off" poutine, where it's chunky fires, lots of gravy and lots of cheese. I call it rip off because they don't use cheese curds. The week after that I had a fish burger with pea soup. I am not concerned about the pea soup but I didn't know the fish in my fish burger would be deep fried... I never had something deep fried in over a year... and then today... I had my last "celebration" meal, which was a sea food platter which had 8 oz halibut, 5 Shrimp, 4 Scallops, and a "cod cake" when it's like a pattie made with cod, and potatoes. On the side of that i has some mashed potatoes and veggies. But once again... I didn't know in till I got it, that the fish would be deep fried (both in a batter or course).

I did weigh myself this morning, before I ate that very unhealthy lunch... and I didn't gain weight. So even with my eating habits bad this month and worse as the month comes to a end, I still haven;t gained weight but after this meal... I feel really disgusted with myself and now very paranoid I will gain weight back. Because I did feel so bad about the deep fried stuff I did head to the track where I walked a brisk pace for a hour, but I don't think it is enough to counter act it. I never input the cardio on MFP app because I don't trust the calorie burn. Plus when I see I went over fats, I dunno how much of that I burn off, I can only kidn of guess the calories.

I dunno if MFP is the best app for help me maintain weight, but my activity level is actually not very high. I do some strength training, so I have a bit of muscle mass, but nothing too vigorous, and I hardly do cardio as I used too. I basically sit on my butt all day. So, MFP tells me I have to eat 1710 a day to maintain my weight, and I have been using that as a guideline and I have no idea it's even accurate and different sites and apps tell me different numbers for maintenance.

I'm 133 pounds, and I am 21 years old and female, and I am 5'5''. And of course, eating such things has taken me over my calorie limit on those days I went to eat out.

I am getting off track. Anyway, I am feeling utterly gross and guilty about how I ate this month, and I can't get it back. I keep telling myself when I move, I will go back to my super healthy eating habit ways, but I almost don't trust myself. I feel lucky for not gaining anything back this month(yet) and even though I haven't(yet), I feel upset with myself that I even put such food past my lips so many times in one month.

In summery, is it possible to out exersize your splurges so it does not have any effect on your weight?
Does MFP give the most accurate numbers for calories burned and calories needed to maintain weight?

If anyone knows any sites they think is better for weight maintenance, or calorie burn, feel free to share too!