I know when you're on birth control, and you take your placebo pills you get withdrawal bleeding, not a true period. If you were pregnant would you still get the withdrawal bleediing at the same exact time each month? I have been on the pill for 2 years. I got my withdrawal bleeding right on schedule. I have taken 3 home pregnany tests, two on the day I started my withdrawal bleeding, and then another one 8 days later, both were negative. could i still be pregnant?