wp admin not logging in

pls , i will like anyone to assist me resolve some mistake that i mad eon my wordpress settings.

At my settings i saved my url as https://www.theloveissues.com, so whenever i want to login i use the normal wordpress admin login-wp-admin but 2 days ago i was reading an ebook i bought online that was instructing me on changes to make so i went to my setting and changed the url to https://www.theloveissues.com/blog. and that has been the issue since then cos i can not log in to the admin and the site, my subscribers said that they can not log in again.

Pls ca any one help me to resolve this problem?