Implantation bleeding a week after intercourse?

Hi everyone....I have a little problem. I'll appologize in advance for the extent of information I'm about to give you. lol Okay....I had my period December 20th and it last for about 4 days. Later that week (December 28th and 29th) I engaged in some unprotected intercourse. I know better and everything but I was stupid. He pulled out right before he climaxed....and I'm aware that you can get pregnant with precum. I'm pretty sure there was precum in me because he pulled out right when he was "climaxing" and now it's a week later. Like 2 days ago I have been wiping and pink/reddish blood has been coming out. No cramping, no pain what so ever. Half the time my urine is normal color but when I wipe it's pink. I don't think it's my period because I've always been regular (28 days) and I'm a heavy bleeder (tampon and pad) whereas right now I can't even fill a pad up. This is going on the 3rd day now and I'm not sure what's going on. I'm due to start my period January 17th....so I'm a little confused about it. If anyone can please give me their opinion, I would really appreciate it.

The problem is that you can't figure out if it's pregnancy until your period is supposed to come. This is also when home pregnancy tests are accurate at measuring hcg levels (pregnancy hormones).

The timing you had unprotected sex could have been around ovulation day, and the bleeding afterwards could be indicating implantation.

Now, it is not necessarily one until proved. It could also be some kind of vaginal lesion, a cervical inflammation, from ovarian cysts, etc

I am afraid you will have to wait for another few days to get tested. Good luck!

I'm having the same problem, although mine is just spotting...and I'm on birth control, and that can cause spotting. Are you on the pill?

No, I'm not on the pill....my breast are sore but I'm 21 so I think that can be from them growing probably. Other than that I don't have any pain. Just a while ago I went to the bathroom and my urine was of normal color but when I wiped it was pinkish/brownish now. Who knows...it's tough being a woman. lol