I think i have anxiety and maybe even slight depression, christian help please?

im a 15 yr old guy. my mom lost her job and is now going back to school (she will be done next july) so my dad is the only income. it seems like its always something that needs to go wrong, whether it be our '02 van with 200,000 miles on it breaking down, my dads transmission, our $2,000 house payment(built a new house then my mom lost her job), my older brother being in iraq, money, finding renters to rent our other house that we havent sold yet or something random. i hate not being able to spend money like we used to, it freaking sucks. (no vacation, i have to pay for my own abercrombie clothes, ect.) my mom is always the realist or the one who always says "no, we dont have the money" and gets b!tchy about it. she always has to turn something positive i have to say into something negative. ("mom, theres this cool smartphone i was looking at and i was thinking i could get it for my birthday with the money my aunts and uncles, family, give me" Her- "no, we dont have the money, you already have a smartphone and you dont even pay the bill you have now!") my dad just pisses me off in general. most of the time hes ok, idk. he tries to tell me how to drive when hes a horrible driver himself. and EVERYONE around me will ask me to do things for them because they know i will do it, like my grandma ask me to get her water, ect. but its not just some of the time, its everytime i walk past them or see them. im always doing something for someone; yard work, cleaning, going to the store, getting someone a gl of water, ect. it makes me so mad because they only ask me, not my lazy *** little brother who broke old car windows in a barn that costs $1,500 to repair (which will prevent me from getting a scion tc, the car ive been wanting for 2 years now, that i deserve, i have a 4.0 gpa and all a's since i can remember, i think thats pretty deserving to have a nice car). and he didnt even get in trouble for it! fml. i feel like everything, even little things anybody asks me to do or says to me pisses of off. even if my mom hits my sandal off my foot when im sitting down with my foot over my other leg, it just gets to me. then she will go "awe, baby gunna cry?", and make these crying noises, ugh pisses me off. she thinks shes always right about everything. and i havent been making the right choices as in not following what the bible says and ive drifted away from god. i read my bible everynight and pray but it doesnt seem to work. i havent gone to church in a couple weeks though. (which reminds me, my mother called upstairs to my room like an hour ago and said "set your alarm clock for 8 am if church is important enough" i yelled back down "i set it for 8 last sunday and you told me to go back to bed because you were tired!" and slammed my door, she didnt say anything) and some days i feel like crying, other days i just want to punch my lazy *** brother, hes 11 yrs old btw, and other days im as happy as can be. and i feel like even if i vent to someone(like i did to my friend a couple days ago) i still feel like it hasnt helped at all. it seems like my parents look right over all the good things i do and focus on the couple bad things i do, ugh. and dont tell me "all parents are that way" or some dumb stuff. i know i shouldnt doubt Jesus but sometimes i get so down that i have to ask "why me? what have i done to deserve this?" and other times i tell myself that god has a plan and hes doing this for a reason, to make me stronger or something, idk.