Bbt chart- dip and triphasic. Can progesterone supps cause this?

I have a very clear implantation dip of .8 degrees on day seven. That was followed by 4 days of the very highest temps I have ever had. I have 1  1/2 years of charts to reference. At first I was very hopeful but then I wondered if all this could be caused by the progesterone suppositories I am on. This month is our first iui and I have taken the progesterone since the day after iui.