Way too much and way over the top. Men rarely like surprise declarations of love. Especially at work where it is very inappropriate to have one's personal business on display in the workplace.
Actually, it is a big deal when you disrespect a guy and "just show up" at his place of work. Men get a lot of their personal value from the job they do. You demeaning where he works at isn't cool. Working at Hardee's is an honest job. He isn't the only one who works there. There are other employees plus there are customers. They shouldn't be subjected to your pushy impromptu visit. Why the surprise at work?
Bad idea... At work is not the place to tell him "I love you " (for the first time) and even a worse place to tell him you're pregnant (if he doesn't know)!