I miss myself sometimes

I hate life right now. I'm so stressed over everything that I feel like its changing me, like, I don't even remember me anymore, all I see in the mirror is a tired stressed out girl that doesn't know what to do or how to get a grip back on life. Cross Country, Tennis, Work, School, its all piling up on me and its so bad I get these terrible stomach aches. I just need to vent really but i have such unique problems id be surprised to find sympathy.