From positive to a regular period

Last October 14 because delayed sa period for 5 days I tried to take PT and the result came out positive after noticing it for 15mins. Then after that I took another test and this time binantayan ko na po and it came out positive again.. Afternoon with my hubby to be sure I test again and it came out positive again.. And because I had a record of miscarriage way back 2016 I consulted an OB and she prescribed me some vitamins and I asked for Pampakapit and she recommended duphaston 2x-3x /day.. But my concern now is why I am having my period? I started having spotting October 17 just like before If I am having my period and tonight it really is blood gushing out.. I feel no pain at all... Is it possible that the PT is defective? Hope someone would notice... #firstbaby #1stimemom #advicepls