Any ideas? I'm getting really frustrated.

Hey ladies! So, since giving birth almost 5 weeks ago I've been breaking out in these really itchy rashes. But it's only on my chest. I had this 1 time while I was pregnant and they said it was pregnancy related. I thought once I had my baby that it would stop.

It starts out just being really itchy for a day or two then breaks out in a rash. The rash gets so bad that my skin is raw and starts oozing a clear liquid. Then it'll start healing. This process takes about 1-2 weeks with only a few days where I'm not itching. I'm generally barely healed from the last rash before the next one starts up.

I do have an appointment with my Dr in a couple days to try to figure out what is going on. I haven't been eating anything new or using anything new. So I'm really confused why this keeps happening. If I could figure out what is causing it I would know what to avoid so that it stops happening.

Any ideas what is causing this? Have any of you experienced this? And if you have, what caused it for you? And what did you do to stop it from happening? Any ideas would be appreciated.

(This picture was my last breakout at it's worst. It doesn't look like much in the picture, but I was in so much pain when I took this. Everything hurt. The only thing that I could put on it without it either burning like hell or causing it to itch like crazy was Neosporin.)