Might Be Allergic to Pad?

Hey everyone so this is something I think i might have discovered, an allergy to always foam pads and I recently caught on! My sister likes those and everytime I wear them I feel like my skin burns and I get itchy, and my clit gets swollen. It’s the worst feeling! I thought I had an STD and went to go check but I turned out negative syphilis and other things I can’t remember(it was 6 months ago). Then I thought it was my detergent or fabric softener but I changed it(been trying new ones since 3 months ago)and I still had a rash, but now it all makes sense!!! Every time i get my period my rash is healing then i wear a pad and makes it worst! WTF I’m so upset :( Imma switch up to organic products. What are some that you recommend?