PLEASE HELP: Can progesterone stop a period after it’s already started???

Amy • 🌈👶🏼#1

So my doctor put me on progesterone cream about a month ago and the way it works is I take it until day 28 or my period starts. Well this month my period never came so I stopped doing my progesterone and waited for my period to start except it never did. So I told my doctor and he said to start again on day 6 and take a pregnancy test too. I took a pregnancy test and we couldn’t tell whether the line had color or whether it was an indent. Meanwhile yesterday was day 6 and I started with a little bit of bleeding, so I started my cream again that night like I was supposed to and this morning the bleeding is gone. Did it stop my period or could it be that I’m pregnant and I tested too early?