Should I use ovulation kits while on metformin?

Je

I found out in the beginning of the month I have PCOS after ttc for 5months. I got put on metformin for two months taking 2000mg aday. Should I start doing ovulation test to see when thr right time is I dont wanna miss it!! Need some input please. I'm new to all this 😕 I have a 4 year old son I had no problem getting pregnant with him at all.