Mild dysplasia can mean many things, including an infection where the area was swabbed. The PAP smear took samples at the top of your vagina; near where your cervix was. Because you had a diagnosis of cervical cancer it would make sense that your physician would want to look into this mild dysplasia diagnosis more closely.
The first question you need to ask yourself is whether this bleeding even represents a "period" or is due to some other medical reason what has nothing to do with menstruation.
While there's a tendency to lump every incidence of vaginal bleeding into the category of a menstrual period, there can be other medical reasons (some benign, some serious) for abnormal vaginal bleeding.
Doubling up on birth control pills (and taking Plan B which is simply a heavier dose of hormones) can throw your menstrual cycle off schedule and this MAY be what is happening here.
Keep in mind, however, that taking a pregnancy test one or two days after missing a pill and having sex is useless in determining pregnancy. Conception may have taken place but until the fertilized egg actually implants into the uterus (generally 7 to 10 days after conception which takes place in the fallopian tubes) the body is unaware that conception has taken place.
About all you can do is wait for your menstrual period and if it does not come at least two weeks after missing that pill, you take another pregnancy test. Generally one remains covered against pregnancy if they miss one pill so pregnancy is rare...but not unheard of...missing one birth control pill.
A total hysterectomy is major surgery. It should not be entered into lightly. While it may have been over done in the past, many insurance companies require that certain less invasive steps be taken before the decision to surgically remove the uterus and ovaries. This is a good thing although I know the biopsy isn't much fun.
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