I never has a postiive ovulation test this month has just showed high fertility for 2 weeks. If im 28 day cycle will be due on next week but i have only had 1 period since having baby so not sure how regular. For the last 2 days i have had dull ache really really low down in tummy,i did have stringy CM until 2 days it was white & quite thick. Ive tool a pregnancy test which was a BFN. Could i be pregnant? Could the pain & CM be implantation?