Is it bad to reuse dental floss pick? currently im changing a new one every 2 days. is that okay?

Healthy Gums: It is probably no worse than reusing a tooth brush. If you have excellent oral health then minimal concern. If you have active gum disease and bleeding when using the pick, then you must see your dentist as soon as possible. Healthy gums do not bleed unless cut!

It's Ok...Usually: If you rinse/clean the floss pick, you can certainly use it more than once. It's just like a toothbrush in that manner. But, don't share it with anyone, don't use it more than once if you're sick (cold or flu), and don't re-use it if you have ongoing gum disease (what dentists call "periodontitis").

Disposable: Floss pick, like a toothbrush, can be cleaned and reused by you alone (don't share with other people). The device 1) Should be used only if advised and supervised by your Dentst as incorrect technique can cause gum recession, and 2) It is really designed as a disposable instrument, use once and throw away.