Bfp hpt's, chemical, now cramps! Help!

Hey ladies, so I hoped someone could help me out with this... I had 7 bfp's (started light, but were definitely getting darker) in a row, went to the drs and they sent me for a blood hcg because I'd started bleeding. My hcg came back at 1.42...negative! Dr said it must have been a chemical pregnancy, that I could get another hcg done a few days later if I wanted, but didn't need to. I was so devastated I couldn't face going back. Then today I've had such painful cramps! AF not due until 30/05, so it can't be that! Any ideas?! No chance I can still be pregnant, is there...? (Wishful thinking, I know !!)