I have questions

After 8 months of breastfeeding I made the decision to end the journey. My milk has been drying up as the days go by and my son was getting crankier as time went on and he was perfectly fine transitioning to formula. I tried weaning him as time progressed but he wasn’t having it. I am now day 3, 4 maybe without any breastfeeding whatsoever and I’m feeling the engorgement. I have been icing, hand expressing, ibuprofen, and massaging. Today I have decided I’m going to be taking Sudafed to maybe, hopefully speed up this process. If someone on here took Sudafed, did it help and if so how much longer did the process took? Any advice and insight is much appreciated.