Refund loan after filing

Is there any way to go back and request a refund loan if I have already e-filed? I did so on the 15th of January and am having it direct deposited to my bank account. Obviously it is still pending at the moment. I neglected to choose a refund loan, but am having second thoughts now and would like to. Is there any way to do so, or do I just have to wait it out now?