Tubal Ligation has a failure rate of somewhere between 0.1-0.5% by most estimates, and the risk of the operation becoming unsuccessful can increase over time (potentially a cumulative failure rate of up to 2%). so it's possible that this has happened to you (it unfortunately has to happen to someone).
If you used a urine test that looks for Human Chorionic Gonadotropin (HCG), which almost all tests do there is the chance of a false positive if you have either blood or protein built up in your urine.
Pueraria Mirifica should not cause your body to produce HCG but it can affect your circulatory system (increasing blood pressure or if taken for a long time, causing clots) and if you've put your body under stress lately it may be the case that you've had some (very very minor) bleeding in your urine tract, which could form a false positive.
While the positive test is somewhat out of the ordinary, it's a relatively common side effect for PM to delay periods, especially if your dosages aren't matched to your menstrual cycle (essentially you are doing the same as not taking sugar pills whilst on the pill, although i wouldn't suggest PM be used as a contraceptive)
Regardless, as with any pregnancy test you should see a doctor about it if possible, just to be sure (and be honest about the PM). It's unlikely that your operation has failed, but it's pretty unlikely for PM to have caused the test positive too so better safe than sorry, especially when it may imply something else is wrong.
Best of Luck
If you used a urine test that looks for Human Chorionic Gonadotropin (HCG), which almost all tests do there is the chance of a false positive if you have either blood or protein built up in your urine.
Pueraria Mirifica should not cause your body to produce HCG but it can affect your circulatory system (increasing blood pressure or if taken for a long time, causing clots) and if you've put your body under stress lately it may be the case that you've had some (very very minor) bleeding in your urine tract, which could form a false positive.
While the positive test is somewhat out of the ordinary, it's a relatively common side effect for PM to delay periods, especially if your dosages aren't matched to your menstrual cycle (essentially you are doing the same as not taking sugar pills whilst on the pill, although i wouldn't suggest PM be used as a contraceptive)
Regardless, as with any pregnancy test you should see a doctor about it if possible, just to be sure (and be honest about the PM). It's unlikely that your operation has failed, but it's pretty unlikely for PM to have caused the test positive too so better safe than sorry, especially when it may imply something else is wrong.
Best of Luck