could it be implantation bleeding?

[jalissajames]

Hi. I had unprotected sex about a day or two before my period ended (the 11th or 12th) but he did not ejaculate inside of me, about four or five days later (the 18th) I started what I think is spotting. It happened one time that day and again the next and no more so far. I have never experienced an irregular menstrual cycle, my period is usually very predictable and I've never had two periods in one month. Could this be implantation bleeding? Could I be pregnant?

[remar]

Try not to stress, I know, easier said than done. Stress can delay your period though.
Try to hang in there for two more weeks and then test, unless you get your period.
You may already know this but I'll tell you anyway just in case you don't know. You can buy pregnancy tests at many different stores. Walmart has them for a dollar and sometimes you can find them in the 88 cent bin. If you have a Dollar Store or Dollar Tree in your area you can buy the tests for a dollar. You do not need a parent or someone older to buy one for you. You can buy it yourself.
That's great news that you are having no other symptoms. Just so you know, bacterial infections and STD's can take awhile to show any symptoms. I'm still recommending you see your Dr or go to a woman's clinic for birth control and to be checked for any infections or STD's. I think it just makes a person feel better to get that clean bill of health. It's also a relief to get on birth control so you don't have to worry about an unplanned pregnancy.
Oh, another thing. I keep forgetting to tell that even though your boyfriend did not ejaculate inside of you, or if you're using the pull out method, you can still get pregnant.

[jalissajames]

I am not having any symptoms of an infection or std.  Yes, my period would be due again in the next two weeks

[remar]

Yes, it could have been implantation bleeding. Not all women get this but if they do it usually happens within 5 days of intercourse.
Are you having any unusual symptoms. Not pregnancy symptoms because you would be having those yet if you were pregnant. I mean any itching, burning or unusual discharge? I'm asking because if you have any of these it could be a possible infection and sometimes that can cause unusual bleeding.
It's way to soon for a pregnancy test. You will have to wait at least another week. That's probably still to early so you may want to wait two weeks and get an early pregnancy test. You should be due for your period again in about two weeks, right?