Need advice

Hi!

I am currently on cycle day 30 after taking provera to induce a period. As i had not had a period since coming off birth control (IUD for 3 years with no period) because it's been so long since I've had a period when would you suggest I start testing for pregnancy? Glow suggested I ovulated around Christmas eve, then I had very light spotting that was only there when I wiped New Year's Day/2nd of Jan. Would you suggest I start testing now or wait another week as I don't know how long my cycle is?

Thank you!