I'm having a similar issue. Whenever I wipe I have pinkish discharge. I'm 4 weeks and 4 days. I'm scared. I've had 2 miscarriages and I don't know if I can handle a third.
Implantation bleeding happens at week 3 when the egg implants unto the lining of the uterus. You can't get a positive test result until *after* the egg has implanted. A lot of women experience some slight spotting at around the tune they would normally have had their period though.
I think it's most likely implantation bleeding that happened to me when I was 5 weeks pregnant it was brown in color though
May be you should see the doctor. I have never experienced that.