44ab Audit

My Sales T.O. (Trading) for FY 201718 is below 1 crore and my net profit for said period is below 4%. I have not opted for 44ad in previous years (Not even once) should I get my accounts audited under 44ab or is it not required. I have maintained the books of account. I cannot opt for 44ad because my net profit is not up to 8 or 6% Pls help.