My response is actually slightly different from the other ones here - buddy, Ps get degrees. I did Arts/Law as my undergraduate, and I was really young at uni and living by myself so there were some subjects I went to one lecture and then turned up to the exam. One subject I didn't leave work in time and I missed the exam. Fail. That looked great on my transcript! Other subjects I loved and topped the subject in.
I've never had an employer ask what my grades were.
Granted, if I'd wanted to work as a lawyer at a large law firm that probably would have been different - and I did choose to do postgrad and am now doing a PhD, so of course they wanted to see my transcript then. But, aside from that, I get jobs because I did good work at my last job, I get referred and recommended, I write a good application letter, I present well at interviews, I come across as competent and at least marginally pleasant, I'm enthusiastic, and (when relevant) I have the basic qualifications: I have the required degree.
This is in no way a call to people to be lazy shits and not give a fuck about doing their best; I think the only true reward and motivation in life is the internal one of knowing you're always trying to do your best and be your best. But I also think, from observation and experience, that all this talk of needing postgrad and the best grades etc to get any kind of job is absolutely wrong. The people I know who get more knock-backs are usually the people I wouldn't want to hire anyway (of all ages), and even the best people I know get knock-backs. It's just life. I've gone through stages of sending out twenty applications a week - even to places not hiring at the time. Post-grad and grades matter for *some* jobs in *some* companies, but the vast majority come down to having the basic qualifications (if there are any), having a good track record of work experience, presenting well in letters and interviews, knowing the right people, and LUCK.
So just try to chill out, do your best, enjoy learning new things (because you generally do better when you're enjoying it anyway), and just get the degree. Worst case: defer for a year and consider whether you're in the right degree, or even whether apprenticeship or practical industry training is a better fit. It's all good.