Unfortunately, acceptence rates to CS at UIUC are extremely low, in the range of the other top CS programs in the USA. They were competing aginst people with GPAs > 3.9, math SAT II of 800, AP Calc BC in Junior year, and a higher level math course during senior year, etc
Had the OP being applying to LAS at UIUC, they would not only have been accepted, they likely would have been invited to enroll in the Honors College.
That being said, @XtremeBlaze777 - getting a 4 on AP Physics I is pretty impressive. Only 21% of the people who take that AP get a 4 or a 5, and they have to work pretty hard to get to that point.
Being able to write that at 18, after a couple of big disappointments, tells me that you will do well wherever you end up, and, more importantly, you will do well in life. There are people three times your age who don’t have the wisdom to realize this.
Good luck!
PS. That line should be quoted to every students who starts writing about their “dream school”.