Hello Shruti.

See the marks u have scored is not enough for h to bag a seat in the good colleges like NITs IIITs to pursue ur higher studies in the field of ur interest under barch courses. U should be going for private Institution for ur barch career. I m providing u a link for ur help.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning/amp&ved=2ahUKEwj7mLqy05viAhUXk3AKHSXSAKAQFjAAegQIARAB&usg=AOvVaw2MH5TbFgLJzAvPJZWHnUEp&ampcf=1

Yes there is an advanced exam of the architecture paper also called AAT. I m providing u a link for ur help.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/jee-advanced-aat&ved=2ahUKEwidgdvu9Z3iAhVDLY8KHc5XCZ0QwaICMAx6BAgPEC8&usg=AOvVaw1kaPMTwf-y0T_4Lu89CBoA

Ask if any query. Good luck