R.B.
You have stopped taking the pill too right? I haven't had a baby in almost 6 yrs, but I thought the recommendation was to be off pills, shots, whatever for 3 months before you tried to conceive. Switching to the pill you weren't jump starting ovulation, just jump starting your period. The whole point of the shot, implant, or pill is to prevent ovulation. If you're still using birth control (other than condoms or diaphram) you're not ovulating and you won't get pregnant.