If I sent a link to my ex boyfriend that was an email in my yahoo email account, can he access my email?

I realized the url link that I sent my ex in an email (of a confirmation of the flowers I ordered for him for his daughter-in-law) opens in my email account. I went in and looked at my sent mail to see if the link was showing his confirmation and pic of the flowers, it opened up my email account. I then logged out and changed my password. Will he still have access to my account?