Hello Vansh,
I am afraid the answer to your question is no . This is because you have already registered yourself as a general candidate while appearing for these exams . Whatever category you give them at the beginning will be considered till the end. Hence, you have to attend the counselling as a general candidate, this is also due to the fact that you do not have ews category rank .So you rank will be based on general category which can't be changed now .But there is  no harm in inquiring about it directly to the respective officials hence since to be on safe side you may mail them directly and aslk of anything can be done regarding this.
All the best

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