Preggo or no ?

I had 8 first response test tell me I was pregant and 2 blood test tell me I am NOT pregnant. All of the first response tests were over a 2 week period and digital and two lines. My last period was August 25th. My gyno put me on medroxyprogesterone, I which is a five day pill that encourages your period to come. My gyno said if I get a period I'm not pregnant and if I dont get a period, I am pregnant. Well I finished that pill October 19th and still no sign of a period. Am I FINALLY good to say I am pregnant ? How long after this pill should I see my period?