Nursing student stress!?

Interesting that I have been in nursing school for 1 month and I am seriously reconsidering my major. How can I be this stressed out in this short amount of time? I have an A in Theory and Pharmacology I have a D which means I will be kicked out unless I get 100% on my final, or take it over. I am not one to quit; however, I feel so lost and saddened by the fact that I have worked 5 years on my pre-reqs(have a 16 yr old and an 11yr old so I did it the slow way), I am 39 and just so pissed at myself. It is true when they say I was a 4.0 student, now I am a nursing student. Seriously what to do? Any fellow nurses/students out there to offer some sort of something..tell me it gets better, tell me to get out now and maybe do LPN, get a little experience and then go for my RN. I cant trasnfer to a different school because it took me a year to decide to apply to this private college in Los Anegeles, since all the community ones are packed....In any case, any advice would be fabulous.