WTF!!😣

So 3days before AF arrived...I I tested and came back BFN....I bled 3days...and spotted brownish for about 3days.just when I would wipe or go to the bathroom and see what I was feeling and that was that....had sex about and a half before I started this bleeding and then 3days prior to bleeding... (bleeding started 3.9.16 ) since then I've been feeling flutters and tiny movements and it's the SAME feeling from when I had my first...I felt flutters and little things moving around at 8wks any similar experiences??? O!! And btw...I tested after the spotting stopped completely 2days after and obv. BFN...