Bleeding

So I had a miscarriage on April 8th and have been trying since April 14th. My period was not due until May 12th but on the 10th I got some brown pink when I wiped so then I put a pad on. On May 11 when I woke up it was more reddish. Light flow tho. It had stopped on May 12th. May13 was just spotting. I read that implantation bleeding can be red. I am just wondering if anybody has went threw this or what your thoughts are. I took a test on May 11 BFN I am going to re take on Monday May 18th.