My experience with the South Florida tech market is that it's simply trash. If you can, I would move to a better city. There are far more canadates than there are jobs there. Where I was barely getting any responses back down there, since I moved to Boston last month I have literally had some type of interview almost every day and got 2 offers this week.I have the opportunity to retrain for the A+ I got testout software through my school. I should reup mines since it's from 07.
I'm wondering most likely these jobs are checking when my a+ was given which is probably why they don't call back.
Other than that, I would put on your resume how the work you're doing now can be translated to a help desk position (good customer service, communication skills, quick to learn new concepts, etc.). Also, find a recruiter if you can. They will have better access to contract roles that can help you get some experience for your resume and may even keep you on.