Ttc

I have been struggling with infertility for 4 years now and last year I have been diagnosed with Endometriosis stage 4. I have passed 7 months now post laparoscopy excision surgery to remove all cysts from the pelvic area. My husband and i have been trying for a baby ever since. The surgery healing process is suppose to take up to year, but the doctor said it is expected to get pregnant as the area has been clean and clear. My cycles vary between 26-29 days. I usually have regular periods, but this month is the 7th cycle and for first time i have experienced spotting starting with light blood stain on tissue the first day followed by thick dark red/brown stringy discharge for 2 days around the expected period but did not have my period. I have had sore/fuller slight sensitive breasts ever since and it is day 35 of cycle today. I have done a pregnancy test few days that came out negative. Any suggestions of what this could be? Is it Implantation bleeding ? As i did not have my period.

[Lilly12255]

I suggest you do a home pregnancy blood test to be sure as urine tests are not fully reliable