So I have a question, (it's very detailed) I had been taking birth control on and off since I was…

So I have a question, (it's very detailed) I had been taking birth control on and off since I was 15, recently I have been on the nuvaring, well I wasn't taking it for a while had a period last week of may, put it in for 2 weeks. June 12th Saturday took it out(had unprotected sex) that day. on the 16th Tuesday started having brown discharge VERY light, then today Thursday the 18th woke up was mild bleeding has been all day, I read online about implantation bleeding. I don't know if it could honestly happen this soon, I never got my period early it's always been the last week of the month even when I stop taking my bc for a while. I just took a test came out negative, the doctor said to wait and see if I get my period next week which is when I should have it. So I was wondering if anyone has had this experience and is pregnant??