Implantation Bleeding or VERY early AF? TMI!!

I have a 31day extremely regular cycle. From around 5/6dpo I had very light cramps, around 8dpo I had a lot of pressure in my lower back and mild cramps again on and off all day accompanied by some spotting - this is very strange for me as I have never had an early AF. Since the spotting started it has been on and off for the last 5 days especially after a BM -sorry TMI. I haven't really had any cramps since about 10dpo but still some light pressure in my lower back but only in the evenings.

Only other symptoms have been extremely tired and irritable and some sharp shooting pains in my nipples and tender slightly swollen boobs again only on and off! Feeling very confused and nervous! Not due on for another few days!

Has anyone else experienced anything like this before? Praying for a BFP! 🙏🏽

Sorry lots of pictures but this has been the changes in amount over the last few days in order. Last picture was this morning.