It is best to transplant when a plant is about to outgrow its current pot, but it will be ok as long as you aren't overzealous and water to much. The problem with a little plant in a large pot is that the soil around the roots will not dry qiuck enough and overwatering and root rot can happen.
Let the plant get all the way dry before watering/feeding. This is vital for the plants health because overwatering is a very common problem.