What cup size would I range from with 310cc implants? I am a 32A and had my surgery yesterday. Scared they will be small

It is far too early to draw any conclusions about your final outcome and hopefully you and your plastic surgeon thoroughly reviewed your options preoperatively. Trust your surgeon and his or her  judgment and hopefully you will be pleased with your final result, which is generally the case in 95% of women who undergo this operation, based on published statistics. The other reason to relax is that worrying will accomplish nothing productive or useful. If you end up feeling smaller than you would have liked, you will have two options. Continue to wear padded bras as you probably did before surgery and learn to like the new you, or consider revision surgery, which is the only way to truly change your final nude appearance. I would discourage you from considering option B prematurely, and I recommend you discuss your concerns with your plastic surgeon.  Best of luck. 

Congratulations on having undergone the breast augmentation procedure. Online consultants will not be able to predict, with any reliability/accuracy, what cup size you will end up wearing. You will need to go bra shopping/fitting; in my practice, I ask patients to wait 3 to 6 months before doing so. Don't be surprised, at that time, if you end up different wearing different bra cup sizes, depending on who makes the bra. Generally speaking, I ask my patients not to communicate their goals and/or evaluate the outcome of breast surgery in terms of achieving a specific cup size ( given the variability in the measurement of cup sizes…). You should be aware that a significant percentage of patients at the early stages of recovery will feel that they are too big or (more commonly) too small. I routinely ask my patients to wait at least 3-6 months before evaluating the end results of the breast augmentation surgery. This waiting time allows patients to (usually) physically and psychologically adapt to the new body image.
In other words, it may be too early to evaluate the outcome of the procedure performed; your breasts will undoubtedly change over the course of the next several weeks/months.
For example, many of my patients report that as the swelling around the breast implants (for example, in the sternal area) decreases, they feel that their breasts appear more projecting. Also, in my opinion, the "drop and fluff” phenomenon does hold some validity; as breast implants “settle”, many patients feel that their breasts actually look larger. Best wishes for an outcome that you will be very pleased with, regardless of the specific cup size achieved.