Long cycle late implantation?

Laura
Hi I'm trying to understand what's going on!
My cycles are long and are roughly 42 days. I am currently on day 44 and yesterday I had a really small amount of fresh blood when I wiped, I also notice slight pink tinge to CM. Could this have been implantation? I've had no bleeding since. I have done pregnancy tests a couple of days before all negative. 
Other symptoms are severe bloating and sore nipples. I've read online some people haven't had a positive until really late - I am praying! Anyone else had a similar experience?