I was wondering if im experiencing implantation bleeding or what on tuesday january 4...And I had a heavy regualar looking period for 4 days...I usually have my period for 5-6 days....I havent had any symptoms of pregnancy only having to urinate prequently.And I gained 4 lbs.....I havent had sex since october......And 5 preg test say negative....Have an appt with gyno on the 25.....Oh and I noticed some blue vien looking things on my breast going down to my nipples....And idea what going on with me?