I have always realized that staying at a healthy weight (neither too low or too high) is the most difficult thing to do....even more difficult than loosing weight because obviously when we quit eating.....loosing weight is the only thing that can happen.
Your future sounds wonderful having future hopes in front of you & your goals are what you should be focusing on & aiming for......while eating healthy is the best way to achieve a healthy life. During my pregnancy, I never ate junk food....I only gained the amount of weight of my daughter as I weighed what I weighed before I got pregnant when I left the hospital 3 days later......one doesn't have to gain if they are eating healthy foods & leading a healthy lifestyle.....but it definitely leaves you feeling much better than that dizzy horrible feeling that comes from not eating.
Eating healthy foods when you are gaining weight back to the healthy weight is the best way to not end up gaining too much & it keeps the weight from going down again while staying healthy.
Value your future & focus on being healthy, not thin or fat because if you focus on being healthy you won't go to the extreme in either direction.
Best wishes for your future & all your plans