Help! Progesterone injection rash

Has anyone gotten a rash from their progesterone injections? I was originally on the ethyl oleate oil but developed a small rash so was switched to the castor oil. My rash got larger and more itchy/inflamed so yesterday I discontinued the oil and switched to suppositories. I woke up this morning with the rash much larger and much more itchy inflamed. I’ve left a vm for my RI but I feel like ripping my skin off because it’s SO itchy. My question is- has anyone else had this and found a solution that made the rash go away completely? I’ve taken Benadryl and am putting over the counter cortisone cream on it and it’s only just taking the edge off. I’m worried the amount of Benadryl that I’m taking now is going to hurt the baby / or the severe allergic reaction will. Helllllllllllllllllllpppppppppp!