At almost 14 weeks, that U/S date can be up to 4 or 5 days early or late. So the Feb 2 to Feb 8 dates are still very likely, but there is a chance for a bit earlier or later as well. If we look at your LMP and assume you had cycles around 28 days long, it might have been a bit earlier. If your cycles were irregular, I will stick with the original dates.