AF or implantation bleeding... anyone who's had Implantation bleeding I'd love you're thoughts

Jamie • Happily married to my soul mate since 2010, together since 2008. RSD Warrior since 08, 1 month after meeting my husband. He has supported me during each part of this evil disease. We have 3 dogs smallest is 75lbs and a 10oz Conure parrot who is the boss.

Hi so my cycle is either like clockwork where you can set your watch to it, or it's late. I have 26 day cycles with 4 day periods 90% When it's off it's a 31 day cycle. My AF is always the same, same consistency each month, always light, and always starts in the middle of the night. Except this month. At first I thought it was just AF. Now I am unsure. I'm going to test in the AM, but I'd like to hear any thoughts. This month it was 2 days early, and started in the afternoon. The first day (which was thursday the 11) was the heaviest (which was still small amount). I went to bed and woke up to nothing, which is odd for me I normally bleed at night, The 2nd day was some spotting a light redish color extremely light. The 3rd day there was some in the morning but then nothing, I thought it was over. Nothing all day which again seemed a little off but i figured my cycle must just be off. Then late at night on day 3 (or early day 4 depending on how you look at it) I noticed very light spotting, only when I went to the bathroom pinkish. The 5th day, which was yesterday there was nothing at all. And tonight the 6th day spotting again tonight. Nothing had happened all day, this time a brownish color not dark but light Again only noticed when I went the the bathroom. I put a liner in changed it quickly and nothing else. I have read about implantation bleeding but I thought it only last a day or two. Is it a waste to take a test tomorrow am is it impossible for implantation to last so long? I dont want to test tonight since I want it to be as accurate as possible.. and I'm not getting my hopes up and I'm know its likely my cycle is just off, it's just weird since my cycle has never once been early, it's always late and my period has always been the same... would love any thoughts. Whether on if I should even bother with a test, whether it sounds like just a cycle... anything