Feel like giving up

My husband and I have been ttc for about a year now and I really thought this was our month. Here I am 12dpo and still getting bfns. My breasts are a little sore, I have acne all over (which I never get) and I've just felt different. This was our second cycle using letrozole, and added preseed and softcups. I'm struggling seeing everyone else get pregnant except me. I'm bummed but trying to stay positive... Sorry for the rant, just stressed