stress (depression)??

I am just tired.. Tired of everything right now.
Beth started college. I can't believe she is almost a grown up now! This makes me so sad. I am not ready for her to grow up and leave me! I know I should be happy for her and I am but deep down I feel like I am losing a big part of me. She has been my best buddy and has helped me through so much just by being there and loving me unconditionally.
I have been helping this year with Katie's cheer team taking lead on all the fundraising. Which takes up every Monday and Thursday evening So her team can go to nationals. Nationals is the end of February and I am already burned out. Sometimes it feels like a very thankless job. Getting yelled at by parents sucks alot.
Dougie has been running a fever around 102 for about a week now with no other symtoms to go with it...
Gavin is doing karate and JROTC.
The kids have all been bickering a ton with each other over all kinds of stuff..
Plus I am now working 2 nights a week at the studio Katie takes gym classes at to pay for preschool for Dougie and have a little extra money. 
Oh and Garrett is upset cause we haven't really had any time for us with running the kids and me being so tired after all the cheer stuff. I don't have time for me so how am I suppose to make time for us!
I wanna throw my hands up and say enough and sleep for a few days!
I am afraid to tell people how I feel cause I hear enough complaining from other people and don't wanna come across like that to people.
I just feel so stressed and wanna cry alot lately.
I just feel like I am sinking....