I'm 16 and have recently gotten put on the shot. I'm supposed to eventually not have a period but i've only taken it once so i'm still having some spotting. It started to get a little heavier and as i was on the toilet i felt something heavy come out. It just felt like a lot of blood passing through but when i looked it wasn't. I got it out of the toilet (with a Q-tip) and it was about 4 inches long, kinda clear but obliviously had blood on it. It looked slimy but it was thick and hard enough to be able to hold it on the Q-tip. It actually looked as if it had veins running through it. I did have sex about a week ago... but what is this!? HELP!