Hi, I’m new here!

Hi ladies! I am new here! A quick little history of myself. I am 28 married with two living children and 3 miscarriages in between. I have been TTC for 3 years and am having absolutely no luck. I’ve had a work up done at my OBGYN and nothing is wrong. This month I am spotting in between my cycle which hasn’t happened before. I am 5 dpo and have pinking brown spotting when I wipe. I do not think this is implantation bleeding. Does anyone else have any idea what else would cause bleeding between cycles??? I can’t google anymore, I feel like my brain is ready to explode! Lol any help would be greatly appreciated!!