Help??!

Momma
Ok, so I'm 7 weeks PP and I have a great stash in the freezer because my girl was a preemie and j was able to pump after her feeding to empty my breast! I'm still pumping throughout the day and only get maybe 2 oz both breast combined, and my breast don't get hard or tingly like they used to! I'm worried my supply is drying up! How long do I have to pump until it's safe to stop?? I'm a wreck!! Idk what to do