bro,
I am here to support you.
Don't drop, don't be lazy, I got 30/100 in my 4U ( I serious did no study, I bombed the exam), there was noone to support me, or tell me to keep 4U, then I decided to drop it. I am still happy, because I did good in 2u and 3u.
Just relax, there is always some problems in our life, you just have to forget about the past, think how you can do better.
Your are smart, we all know that, you can do it, go get that E4, bro!
Good luck,
Here is my brothers true story who went to Sydney boys, as a motivation for you.
My brother was smart, very smart, since his chem teacher give him a lower mark, he ranked 50 that was only his first assignment for chemistry, he worked harder from there on, got full marks in all his other chem assessments and in his other subjects he was ranked 1st. Closer to trials, he ended up smashing everyone in his class, came first in chemistry with 99% in his trial, in math ext 1 he got 98%, maths ext 2 100%, Physics 100%, English Advanced 97% overall. He was very luck to state rank two sciences, maths ext 1 and 2.
He still did pretty well in english as well, don't know why he didn't get a state rank in English Advanced!
He was the biggest beast ever! I use my brothers story as my motivation to get 99.95 Atar.
This shows just how important is to work hard, stay focus, you will achieve you goal!