How long to wait to apply for another credit card given my situation?

I have been in debt for years and am finally getting closer to getting out (only about $8k left to go). A balance transfer credit card with no intro APR would be a huge help for me. I applied for one in January and was declined.

Since then, my FICO Experian credit score has crossed 700, up about 40-50 points (I'm young, so my credit score fluctuates and really jumps once I pay things off.) Do you think enough time has passed for me to apply for another balance transfer card? I don't want too many hard credit pulls on my account.

Just wondering what best practices are. Thanks!