Itching?? 😔

Hello all, i wasn't sure where to post this.. But flow is due tomorrow, i am currently TTC. I am so itchy! from red bloches to hives, I haven't changed anything, same soaps, food, detergent. benadryl helps untill it leaves my system. it makes me so sleepy to take and I hate taking meds so i try to avoid it. could this be a pregnancy symptom? With my first I had to take clomid and Metformin and i had one night of an horrable itchy spell but that is all i remember having.. I do think a cool shower and bed and it passed..