Pregnant after tubal ligation

Kr

I had my second child aug 2017 and with that got my tubes tied. Made sure of it. My daughter is now 15 months old and my boobs started leaking. And headaches started. And mild cramping I was like what is going on. I took a test and a faint positive came. Then I took 3 more and all faint lines. I just moved as well and dropped 47 pounds since January. I was like my tubes are tied. What is going on!? Anyone else have this happen? And what was ur results.