[periwinkle]

This past Monday I had sex. I have been on birth control for 5 months and my boyfriend and I use condoms as well. We found out after sex Monday afternoon that the condom broke, and my boyfriend had ejaculated inside me. I was terrified afterwards and we went to the pharmacy later that night to see if plan b was necessary. I was told that because I was on bc and using it correctly, plan b would be a waste of money. I did not buy plan b and left with peace of mind.

Yesterday night, 4 days after I had sex, I had red blood when I wiped. I knew it wasn't menstrual blood because it had no odor and it was a thinner consistency. It was gone within five minutes. I also noticed that my cervix was very low and hard, but it had been like that before sex on Monday. Today there was more red blood and also brown stringy discharge. I had no cramping last night but today I did have some that lasted for less than 3 minutes. The brown discharge usually happens a week before my period starts. My next period is due on the 27th. It also turns out that this week is my ovulation week.

What are my chances of a pregnancy while on birth control and taking it correctly? Could the bleeding be implantation blood? Based on what I've been reading implantation blood is usually pink or brown, which doesn't explain the red color and it occurs 7-10 days after sex which also doesn't add up. What else if anything could be causing the bleeding?

[periwinkle]

Update: My bleeding has stopped, but now my vagina is extremely tight. I completely forgot that yesterday morning I was late for an appointment and rushed out of the house, forgetting to take my bc. I took it around 3 pm when I did get home. Is it possible that missing the pill that morning and taking it late caused this bleeding?

[Falana]

Well, you said that you are using the pill correctly, and unless you took anything that interferes with the effect of the pill (antibiotics for example seem to lessen the effect of the pill), your body should not be ovulating at all, thus making conception impossible.

Generally, implantation bleeding should be happening around the time you would usually expect your period. Other than that I found something on intermenstrual bleeding on birth control:

What causes bleeding while on the birth control pills?
The most common cause of bleeding on oral contraceptives is unknown. It is theorized to be due to atrophic bleeding due to low estrogen. In other words, the lining of the uterus (endometrium) is quite thin and subject to abrasion just from normal activity.

There are three other factors known to be associated with increasing the bleeding rate on pills: chlamydia infection, smoking and not taking pills. In one study, women with intermenstrual bleeding on birth control pills had a 29% incidence of chlamydia while oral contraceptive users without intermenstrual bleeding had a 11% incidence of infection versus 6% in non-pill users. Several studies have confirmed an increase in intermenstrual bleeding associated with chlamydial infection on pills.

Cigarette smoking has been known to be associated with anti-estrogen effects. While new users have less and less intermenstrual bleeding with each cycle of pill use, non-smokers decrease breakthrough bleeding at a much faster rate than smokers. By the 6th month of pill use, smokers still have about twice the rate of spotting as do non-smokers and heavy smokers (>15 cigarettes per day) have an even higher incidence of breakthrough bleeding.

Missing pills is an obvious cause of breakthrough bleeding. Missing one pill only slightly raises the incidence of bleeding but by the time 3 pills are missed, over 80% of women will have some bleeding if not a full menses. Many women who miss pills (noncompliance) fail to tell their doctors about that and as a result may undergo therapies and changes in pills that are not really needed when in fact the best therapy would be to do nothing but take the pills more regularly. From 25-33% of women miss more than one pill in a cycle.

Maybe that helps