Due to laziness, depression, and overall senioritis, I've let my grades fall to Cs/Ds and an F. (The F is in AP Physics, in which I got a C 1st semester, and I applied for engineering...it's absolutely ridiculous how far I've fallen behind in the material and I can't really see myself passing.) There's a lot of time left in the semester but I honestly don't know if I can get my grades up beyond mostly Cs and maybe a few Bs. I'm scared out of my mind because I don't have any real excuse or extenuating circumstances to tell colleges. Not sure what to do when I have no work ethic, motivation, or problem-solving skills to get myself out of this rut.
I've talked to my counselor a few times but she is very busy and teachers don't have all the time in the world to help me - maybe one or two will give opportunities for extra credit if I ask really nicely. I haven't been making any effort to contact my online tutor for physics because I haven't done the work in the first place. Essentially, there's nothing anyone can do if I don't want to help myself.
What are my chances of being rescinded by, for example, UCSD for mostly Cs second semester of my senior year?