I didnt mentioned ews in jan attempt of jee mains..bt i mentioned in sept attempt, so if my rank didnt improve and i need to consider my jan percentile then, would my ews would be counted...i m very worried.

Hello aspirant,your percentile doesn't depend on your category.If you have mentioned your category in Sept session then it will be taken into account .Based on your best percentile out of jee main 1 and 2 you will be alloted an All India Rank as well as an EWS rank.So you need not worry,if your jee main1 percentile will be your final percentile then based on that percentile you will get your AIR and category rank.
Hope this helps!