11DPO period??

Hi

So I got a peak ovulation result 12 days ago (so I’m assuming I ovulated the next day) which makes me 11DPO. Last few days boobs have been achey and felt very emotional yesterday. Just been to the toilet and was light pink blood when I wiped - is 11DPO too early for AF?? I only

Came off my implant 6 weeks ago and didn’t get my period on them so don’t know when AF would be due. Took a PT this morning (strip) which was BFN- any help or advice would be really appreciated xx