Okay... umm... I usually use a condom when I have sex, I let my partner outside of me without a condom about a month ago. I got my period this past Thursday. It wasn't quite normal, like it wasn't as much as it usually is. Then, it ended on Monday, I really wasn't expecting Monday, I was more or less expecting Tuesday. I let my partner have sex with me on Monday. He didn't use a condom and I let him inside of me, he told me I can't get pregnant because I just had it. Well, Tuesday came around, yesterday, and I had some spotting of blood. So... I asked my partner if I bled on Monday, I don't always notice these things. He said no. But, if I was still on my period, wouldn't I have bled on Monday. So, I don't know. Could it be one of those things where I am spotting and I am like a month pregnant. Or like would I definitely no the difference between spotting and a period.

You most likely were not complete with your cycle on Monday and the hormone surge from orgasm from you and/or your boyfriend caused you to spot a little.

I really would not worry too much. But remember, the only method of birth control that is 100% effective is abstinence.