Has anyone taken Provera to jumpstart their period and ended up pregnant after?

Back story; I took Provera at the end of March because AF had been missing for 8 months. Doctor prescribed me 5 days of Provera 5 mg. I got my period 2 days after the last pill and it was normal and lasted the usual 5 days. The hubby and I have been TTC for a year now. AF is due this Sunday (the 29th) but I’ve been having very light cramps, headaches, mild nausea and very like pinkish and faint bleeding. The bleeding has lasted 2 days and usually my period just starts without any spotting whatsoever. I tested this morning and got a negative. Any advice???