Random Rash

So just two days ago I came up with this rash on my inner thighs, unbearable itching along with it. now I have weird bumps IN my stretch marks that also itch and im getting red bumps on my breasts. can anyone tell me what this is ? and why it could be happening. My SO and I have been ttc for 2 months now, and I'm on my 2ww right now.