I did my 3cc shot tonite. I injected slower than usaul like about 1 min. to shoot all 3cc in. I aspirated and saw air bubbles. When i pulled the needle out, lots and lots of blood came running down my butt down to my legs and had a cotton ball full of blood. Why was there lot more blood came out more than usual. And how fast will i know it if i have injected into a vein?