Is something wrong or is it just my imagination?!

Is something wrong or is it just my imagination?

lately (like the past 4 days) i have been feeling really weak/worn out/tired/thirsty kind of feeling. like when you have been out suntanning all day and you have a sunburn or when you have been very active all day kind of thing. i dont like it. am i just really tired? i try to sleep but it is hard to fall asleep sometimes when i am like this. or am i just worrying about it too much? i am not quite sure. when i feel like this i tell my mom that i feel dehydrated and she thinks that that is not what is wrong. but that is the best description i can give of how i feel. i am not sure. what is wrong? (if anything is wrong) thank you for your time :)

1 week ago
1.) im not an idiot... i know to wear sunscreen and drink water.
2.) read!!! i said that it FEELS like after being in the sun for too long. not what CAUSED it.

1 week ago
the 3rd person may have a point because i did start my period today.

first thing first. if you body says it's thirsty listen to it. thats that.

I get the exact same type of thing on or near my period. I asked my gym teacher about it and she said that it may be iron defiseincy (sp?) She said when I feel like this have a food rich in iron, but not iron pills. I found drinking orange juice and eating appricots (dried or not) at the same time works for me.