BFN!!! Urine and Blood

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I have been trying to conceive my third child and I am still breast-feeding my two-year-old I have had my period come every month on time For the last five months ...I have a short luteal phase which means I ovulate very late( 7 days before next period). Well....my period is now 8 days late and lots of creamy lotion like cm (very heavy) for the past 3 days. All hpt were BFN and I went to dr office for blood pregnantcy test and also BFN...I have been doing research and I think I may be having a cryptic pregnancy ...I’m so scared of not knowing and this has became very stressful( I wasn’t stressed before and stress did not cause my period not to come) yes family has been telling me this 😫