I took my last BC pill on Mar 17th, started my period on Mar 21, then again on April 14th. I have had unprotected sex on days 6, 10, 12 & 13 of my cycle. I did a pregnancy test on May 1 (day 18) & May 5 (day 22) - both negative. On May 3rd, I believe I had implantation bleeding which prompted me to do the 2nd test on May 5th... even though it was negative, could I still be pregnant? I was concerned that I was testing too early? Can anyone help?

Did you read the sticky on implantation bleeding (https://www.askmehelpdesk.com/womens-health/info-answers-frequently-asked-questions-our-health-expert-53865.html) yet?

If you have been having sex, unprotected or not, you run the risk of pregnancy.

You don't mention your age, which could play a rather large role in your periods being messed up, along with stopping the pill.

Whenever you are concerned about your health it is always best to get the advice directly from your healthcare provider.