Whether you drop for a third time in NEET or not thats totally upto you. Like I myself have seen people cracking it in the Third Try and securing Colleges like KGMU. Like this year I suggest you, you must attempt NEET if youve prepared for it. Assuming youre from General Category and secure anywhere above 350-400 in NEET this Year, I believe another try might just be worthy. However you should just risk your year, you may Join B.Sc. in Chemistry or maybe some other relevant discipline this year and parallely prepare for Another Attempt in NEET.

Imcase you continue with Chemistry next year, thats fine too as you have a lot many career scope amd opportunities to explore in future.