Nursing programs are pretty competitive. You need to work on that GPA bc with a 2.8 I don't think you'd get in. But I guess that depends on your university's requirements. Look them up. Usually a minimum 3.0 is required. Go see an advisor. Most places are stuffed to the gills with applications and turn a lot of people away.
I think what you're saying is you're getting your associates in nursing? Some people can find work with an ASN and take classes for their BSN at the same time but that's kind of tough when you're on the job because there's a learning curve wherever you work. If you're trying to get into CRNA school you also need a good gpa and usually 2 years of icu experience which is hard to land right out of school. I think you should forget about CRNA for the time being and if it's really something you want start working on your gpa, getting into a bsn, do well and then look at CRNA. You might have to retake some of those basic science classes too.