When in your pregnancy did you experience implantation bleeding?

Want to know details of coloring and amount etc from many different women. I had barely a 2 day period if even that, 2 weeks ago from today or yesterday and have threw up once yesterday right after I took a few shots of um and thought it was from empty stomach so smoked some weed to calm it and didn't touch anymore alcohol. This was around noon... Then I woke up a few times throughout the night with a stomach ache and a little sweating till I got up at 4 am and knew I had to puke again as I became drenched in sweat ... Have now been really nauseous for the last 4 hours so I can't move off the couch yet to walk and get a pregnancy test.