AoA green candy.

In my view you should take both CSS-2019 and PMS. As you have prepared for CSS then PMS is a piece of cake for you.
Further, in my view you should take 2019 attempt as four months is enough time for a pro like you. As a matter of fact, there is no guarantee, because of trends, that you will pass/fail CSS even if you take 2-3 years gap. Life is so big; do not define success on solely passing an exam. Take it easy ,give your full to your last attempt and then forget it till result.