Implantation bleeding? 2 days before AF and BFN

For the last 5 days or so I’ve had a brown discharge on the toilet paper when I wipe. I’ve never experienced this before. My AF isn’t due until the 19th (I’m estimating this date since I recently had my IUD removed and I’m not 100% sure of my cycle yet). The first date of my last period was March 22nd and we had sex April 1st, 3rd, and 5th. I’m hoping but so unsure! I tested 2 days ago and today. Both came out negative. I know it’s still probably too early to tell but I don’t want to wait! I haven’t had any other symptoms. What are your thoughts?!!! Am I preggo?!