This month was a chemical. My HCG was 57 on Wed. and 25 today. Im going to do my first IVF hopefully next month. My nurse said if my HCG is 0 on Mon. then I can start BCP, if its not she said I have to wait for the next AF. Im sooo impatient! Could it drop this fast? I remember it lingering for a while with my other CP's and MC's. If its close to 0 do you think they will let me start or does it HAVE to be 0? TIA!