your ac compressor is wearing out. the internal bearings are going bad.
best to get it checked ASAP from SABIR, North Nazimabad 2k Stop.
I had to replace my AC compressor 3-4 years back same issue. car felt like it would stop due to the AC load.
brand new genuine compressor at the time was 32,000.
china was 12000
used compressor from scrap yard, was 6000.
the original is KEIHIN company.