Vocal problem help!??!?!?

Hello I'm a 14 year old girl who loves singing. I don't have the money to pay for lessons so I look lessons on YouTube. I whent to the fair like 3 months ago n whent on rides n yelled a lot I took like a week without signing after that I started warming up again n tried to sing a song not like I should have I would sing really loud trying to hit notes I n think that's what started everything I even got lightheaded from siging this was like 1 month ago or so. also at school I'm really "loud" I didn't realize that u was hurting my voice until now. I haven't been siging in a while my throat hurs sometimes when I try to talk. Not always tho like right now it hasn't hurt while I've been talking. I though my solution would be drinking something cold would help but I didn't lol so my throat feels like with a lot of mucus on it but I also drink lots of milk witch is bad I sang like part of a song and it didn't hurt n sounded normal when I talk it sounds normal too, it just feel like there is mucus and sometimes it hurts please help can there be some Cain of vocal nodules or something please help