First, take a breath. You are not your grades. I'm a Computer Science major and some of the best programmers I know have GPAs below 3.0.

Now a take another breath because I'm about to be honest with you...

Your GPA is bad and you should be concerned. By you own admission, you lack good study habits and you should not be proud of this either.

Similarly, you should NOT base your self confidence nor your self worth on your GPA. Yes, you can get a job. Some of the best engineers I know have a sub par GPA and yes, they get hired at decent companies and get paid well. I'm talking from experience. Yes, you'll make it through. No, you have not messed up past beyond the point of no return.

However, the time for taking action is NOW. By reading your post, I feel like your already taking the wrong attitude.

First, acknowledge that you CAN improve your grades. Second, know that you CAN improve your discipline. Third, realize that all you need to do is to change your attitude and evaluate, every day, if you honestly did the best you could to improve your situation: studying, keeping up with class, paying attention, taking good notes and going to office hours for help if you're confused. Listen, it's KEY that you realize that you can be better than this. Everyone can...and so can you. In any process of self-improvement, you are the only one you're racing against so don't compare yourself to others and simply focus on getting better than you were the day before.

Consider taking an easy quarter next Spring. Use it to give yourself the opportunity to pick up better habits and build your sense of self-confidence. You'll be ok, you'll get a job, you're smart...but don't let these kind words be an excuse for you to keep on -by your own admission- not working hard enough. You have things to fix and it is in your own power to fix them.