Is this my period or just spotting?

Hey guys so I started letrozole this cycle and was on 2.5mg but unfortunately didn’t ovulate so next cycle I’m going to 5mg I’m on cycle day 29 and my cycles are 30-33 I had spotting yesterday but today I’ve had spotting and a couple clots is this my period and just super light so could I class this as cycle day 1 as I need to start taking letrozole on cycle day 2

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