Hi, My last period date is 10th January. I had diagnostic laparoscopy and hysteroscopy on 22nd January. We kept relations on day 17th , 19th and 21st day of period (post surgery). My period length is 31 days and today suddenly I started seeing stringy thread like bleeding. Today is just 26th day. Is it implantation bleeding or period? Surgery report is normal. Only left tube is blocked rest all is fine.