I am alergic to levonorgestrel. I had a medical abortion in October with the Mifepristone tablets and then took a plan B in December and my body had a terrible immune reaction that resulted in hives and progressed to shingles all over my body. I have not had a regular period yet, and I am prenant again. I am afraid that the Mifepristone being a derivative of Norethidrone will cause another allergic response if I take it, but I can not afford to be pregnant right now. (yes, I failed to plan ahead and prevent it and am suffering the consequences). What are my options?