Can anyone help to see if I ovulated?

Ch

I have recently started taking my bbt and I do it at the same time each morning (around half 7). My cycles on average are about 33 days and my last period was Feb 13th. I used some cheap opks as well as the clearblue advanced. I got my peak on Saturday 4th. My chart shows I may have ovulated on the 8th, is this possible 4 days after my first positive ovulation test? Any help would be appreciated as im new to this! :)