Chemical Pregnancy

Has anyone on here has had a chemical pregnancy? I took (3) pregnancy test and it all came out positive and my S/O and I where really excited and overall happy he even even gave it a little nickname (his little coffee bean). A week before the appointment I had brown spotting, and it freaked me out but I brushed it off and saw it as implantation, the day of of our first prenatal appointment, woke up feeling back pain and cramps and again I brushed If as nervous and I was overthinking...went to our appointment just to find every test negative and did an ultrasound.. nothing and the Doc had said that I had a chemical pregnancy.. didn't explain that a chemical pregnancy was a very early miscarriage.. I really felt blank and sorta felt sorta bad in the sense of the look on my S/O's face when I told him I was pregnant to telling him that I had a miscarriage..