OPK test

Finally got a positive test today! Should I wait until my test reads “peak” or should we start now? We BD yesterday too but not sure if that was too early. Let me know your thoughts! Also since I ovulated really late, will that impact my chances of getting pregnant? I have been getting a ton of irregularities in my period since I got off the pill in December. I thought it would be regular now that’s it’s been 8 months.