Two chemical pregnancies in a row

Me and DH started ttc last month and got a bfp first time round. Unfortunately it ended two days after AF was due in a chemical pregnancy- we both took it very badly. Fast forward to next month and bfp shows up again. However my test results are growing fainter and fainter and I'm pretty certain the same is about to happen again.

I'm now so worried about whether there is something wrong with me. Has anyone ever experienced this and gone on to have a successful pregnancy? Did you need treatment? Any advice would be amazing x