6 weeks preg, very constipated had some bowel movement and when wiped little bit of pink blood from vagina than none after when i go urinate, normal?

Might be UTI: If the blood is coming only when you urinate it might be associated with a UTI(hemorrhagic cystitis). This should be considered especially if you also have burning, urgency, frequency upon urination. If the bleeding comes any time then it could be related to a threatened abortion. In your situation in ay of those cases you should be seen ASAP to determine what is going on and get treated as needed