Weirdest thing just happened... I'm so embarassed. Major TMI! *Updates

First of all, I've had some on and off bleeding for a few days now - I'm not supposed to get my period for another week. I'm on the pill, so I've come to expect it only when I'm supposed to. The spotting I've been having isn't the regular color that spotting usually is - it's so dark, and sometimes almost looks black. I haven't been too worried, because I was off the pill for awhile and just recently went back on - I figure my body's just not used to it. The color throws me off a little, but I'm still not that worried about it.
But the weirdest thing just happened.
So I just had a nice little bubble bath, got out to try myself off... just normal stuff. As I was drying off and walking over to my clothes, I felt something that I'm sure we've all felt before - like I had my period and was about to start bleeding. Before I could do anything, a couple drops of blood fell to the floor. I shuffled over to the cupboard to grab a tampon, quickly put it in, and I figured all was well. I stood there for a couple more seconds, and then it got even stranger: I peed on the floor a little. Just a little dribble, but that's effing weird. I've NEVER been the type to let a little dribble go... even under the worst of circumstances. I've ALWAYS been able to hold it in. I didn't even have to pee! It just came out!
So I quickly sat down on the toilet so I could wipe up, and as I sat there... WOOSH! More urine, mixed with flakes of blood, like it had been dried out and flushed out by the urine. I didn't even feel more coming... it just came.
So of course now I'm really freaked out, and I'm afraid I'm going to be up all night, worried that I'm going to wet the bed or something!
Does anyone have any clue what's going on with me?!

Okay, I have some updates now, based on what's been happening in the last little while and on other answer.

No, I wasn't pregnant. I lost a baby in January and have been VERY careful since. Condoms AND the pill.

I've also been... leaking since I originally posted the question. My underwear isn't wet... but there is moisture down there. This is crazy...