is 4 a hypo for me

I'm T2 on metformin 2g and pioglitazone 45mg daily , recently increased to 45mg from 30mg. My hba1c has gone from above 100 to 57 since starting pioglitazone a few months ago. Think I've started having some hypos but my blood sugar was 4mmol ( I'm obviously used to it being higher) would 4 be a...