Your pet needs care now
Contact the veterinarian and discuss the treatment and payment plan. Check insurance you already hold; shopping for new cover should not delay care.
You want future protection arranged now
You can compare offers and apply, but record when the contract actually takes effect and when each benefit becomes eligible.
A confirmation email saying the purchase is complete answers an administrative question. It does not, by itself, answer whether an injury occurring this afternoon or an illness noticed this morning can be claimed. Keep the clinical timeline accurate.