Diabetes and Diet

hi,
im a 15 year old female whose been having recurrent symptoms for the past 6 months. At the beginning of this year i started eating healthier (not crazily or anything) i was eating three healthy square meals a day with 2 snacks, plenty of fresh fruit, vegetables, wholegrains, protein and the odd piece of cake or chocolate etc. Around the same time i came down with a throat infection which went untreated but seemed to pass. I started feeling very weak (especially in my thighs) and just exhausted and grumpy. I slept for hours longer then usual but wouldn’t be refreshed in the morning and was unbelievable tired by about 8 pm which is very out the ordinary. I went from about 53 kilos to 48 and my periods stopped. I went to numerous doctors, including and endocrinologist who suggested chronic fatigue and even hypothyroidism but tests were within normal ranges.
My question is under advice i started eating more junk food to put weight on so my periods would return and it seemed at soon as i started eating huge amounts of junk food i felt alot better and my periods came back. It seems like i need junk food to feel good, is this a sign of diabetes or was is just that i needed to gain weight?

any answers greatly appreciated

go to webmd,they will tell you about medical conditions.If you are that concerned go to the doctor and get tested.nobody on this website is a doctor ,so don’t let them practice medicine on you, if you value your health.just for the record what you are thinking about diabetes is frighting .very few people in America need to gain weight.