plume

http://www.thespeechblog.com/ -this is @mcamp's blog, and it's fantastic
https://slpecho.wordpress.com/

I am mostly reiterating what others have said, but you look like a competitive applicant to me! Yes, your GRE scores could be higher, and I do not have the answer as to if that is key to getting into school (and I imagine the importance of GRE scores varies a little by school, but I'm not positive on this.) If you are deciding between spending your time studying or volunteering/getting experience, go for the experience! 
I will be in the same applicant pool as you, so keep us updated on how everything goes!

All schools are going to require Speech & Language Development and Phonetics, so those 2 are good pre-reqs to have under your belt. Most people find those classes fairly easy. A&P of Speech & Hearing is another course that all schools are going to require but it is more challenging if you're already taking chemistry.

NY Medical College is a two year program and does not require you to have pre-requisites. 

@plumeI think you´ve got as good of a chance as anyone. You´re GPA is above average for many programs. It sounds like you´ll be able to get an above average GRE as well. Those things will get you noticed. If you have the time, obviously keep prepping your GRE. But I´d start focusing on exploring your interests so you can identify the perfect programs to apply to. Also, start taking that related work you´re doing now and begin crafting an amazing Personal Statement. 
As for pre-reqs. I´d say try to get a few of the most general ones out of the way. For me, finishing 3 allowed me to apply to my top-choice school (where I´ll be attending in August). Like, Phonetics & Phonology; Language Development; Anatomy & Physiology of Speech - courses like that which will most likely count no matter where you go. Also, those few pre-reqs give you opportunities to meet professors in the field and earn strong Letters of Rec. 

Hi Plume, 
All the schools in my signature block have 3-year programs with the pre-reqs included. There are others (there's a thread somewhere on this forum with that info); I only focused on those 6 because they also have bilingual programs 

My understanding is that programs are more ready to accept dedicated applicants with life experience (your education background specifically seems like it would be a huge plus) than undergraduates straight out of school. Don't give up! I'm not sure what your GPA is now, but your experience, LoR, personal statement, and GRE scores can all work to get you into a program. Like slporbust said, I imagine admission committees are far less worried about your grades from many years ago than your commitment now. Taking one or two comm. disorder classes might be a good idea to show you are committed and can perform well in this track.
Good luck!

My understanding is that programs are more ready to accept dedicated applicants with life experience (your education background specifically seems like it would be a huge plus) than undergraduates straight out of school. Don't give up! I'm not sure what your GPA is now, but your experience, LoR, personal statement, and GRE scores can all work to get you into a program. Like slporbust said, I imagine admission committees are far less worried about your grades from many years ago than your commitment now. Taking one or two comm. disorder classes might be a good idea to show you are committed and can perform well in this track.
Good luck!