TTC after birth control.

Hey ladies. So a little background, I just has my daughter in March and have been on birth control (Norethindrone mini pill) since then. I have had my periods the whole time and they were regular (+\- 2 days). Last week hubby and I decided we were ready to try for #2 and I stopped my pill. We had sex and I was in my fertile period at the time I stopped taking the pill. I had some bleeding that was very period like and with some cramping that I'm guessing is withdrawal bleeding. Will my period still come. Is it still possible I could've conceived this cycle?