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Missed Birth Control Pill.. Pregnancy chances?

I have been on the generic of Levora-28 (kurvelo) birth control for 3 months. The day before starting this pack (I'm in the last week) I had unprotected sex. Soon after I got a call from pharmacy saying they didn't have permission to refill my prescription, and I did not take the first pill of my new pack on Sunday. I got the pill pack Monday afternoon and took 2 pills at approximately 7 pm Monday night. I usually take them at 7 am, So I started the pack 36 hours late. I took them every day after that, but took one at the end of week 2 about 5 hours late. Last Wednesday(3rd week) I noticed light spotting, and it got heavier until Friday, when it was similar a period, and then it got lighter and went away by Sunday evening(the day I started the placebo week.) But I never bled during the placebo week, and I didn't miss any pills in week 2 or week 3 except the one I took late. It's Thursday of the placebo week now. It was suggested that that could have been implantation bleeding. Does anyone have an approximate guess on the likelihood of pregnancy? Any help is much appreciated
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replied February 26th, 2016
No, the bleeding you had is most likely due to slight hormonal changes due to doubling of the pill and not due to pregnancy or implantation bleeding.

Implantation bleeding - This is seen in 33 % women who are sexually active, and seen about 5-10 days after conception just around the timing of their periods. The bleeding is scant and colored pinkish or brown. This bleeding can sometimes confuse women who think that their period has come early, but only realize they are pregnant weeks later. Implantation bleeding will not be mid-cycle as in your case.

In addition, since you had sex in the last week of your previous cycle, during which you were also on birth control, there is no chance of ovulation, and hence no pregnancy is possible.

I hope this clears your doubts.
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