HELLO SUSHMA
It is very difficult to Predict the actual rank since it depends on various factors> your expected rank comes out foer the jannuarys ession coems out to be around 16901. the expected rank might change depending on the no of candates appearing the april session.
since the officials cutoofs from the colleges are yet to be anounced we cannot predict your actual chances but let us analyse the previous year cutoofs

IMPORTANT

There are only two IIts(IIT roorkee and IIT Kharagpur ) offer B.Arch programme. In ordfer to get admission in IIts for B.arch programme,The candidates need to appear JEE MAin paper and after qualifying it they need to apply for JEE advanced after qualifying JEE davanced they will have to register for JEE advanced AAT, wehich is the ebntry tesdt for the admisiion to B>Arch programmes at IIT Kahargpur and IIT Roorkee.

Jee main paper 2 is only for admission into NITs and CfTIs for the admission into B.Arch prograame

https://engineering.careers360.com/articles/jee-advanced-aat

Now as per the previous year cutoffs it is difficult for you get into top NITs but you may get some architecture college. But i strongly recommend you to write the april exam and try to grab a good percentile!! to check which college you might get into with your present percentile then use the college predictor tool which has following features.

JEE Main Architecture 2020 College Predictor

Know your college admission chances based on your Home State, Caste, Gender etc. & exam result

Get your JEE Main Paper-2 personalised report delivered on mail

2.5 Lac engineering aspirants used Careers360 College Predictors

BEST OF LUCK FOR APRIL!!