Repeated chemical pregnancies

Well its happening again. 2nd month in a row since we agreed to start trying again. (Recently look a year break after a year of bfn followed by a cp... we just needed a mental break.) Anyway. i get a positive test, the line is visible and pink stays the same shade for 2 days and freaking disappears. Then the bleeding starts. I have an appointment next month to talk to my ob about what we can do. But in the meantime... does anyone else have this happen? What did your ob say? Google says chromosomal abnormalities so i feel like im doomed forever, but i just dont know enough about this. :(