Congrats on finishing!
What sorts of certification do you need in your state? In mine, it's a pretty rigorous thing to go through, and usually part of a college major (elementary ed or something).
If you're thinking of doing a PhD to teach at the college level (as opposed to practicing clinical psych), make sure you have a really good sense of the job market on the other end, and of the pay scales for your field and such BEFORE you decide to get the PhD.
In my field (English, not unique among humanities re the job market), it takes the average person 8.4 years to finish a PhD (after a BA/BS). About 30% of people leave PhD programs without finishing. And of those who finish, about 50% get a tenure track job in the first year after finishing, and about 30% leave the field without ever getting a tenure track job after 3 years.
Those are DISMAL statistics, and if psychology is similar, you should know that before deciding to go to grad school.
Here's a wiki that will give you a sense of how the job market looks to applicants this year. Your undergrad advisor or someone else in your department should be able to give you a sense of what the market's like in your field.
Sorry, I don't mean to be unencouraging, but I wish someone had given me a better sense of the realities of academic job hunting BEFORE I was in the midst of dissertation writing. (Though I am one of the lucky sort who has a decent job.)