Regulation after stopping BC

Hi I was wondering about periods regulating after stopping BC. We've been TTC for 6 months. December was a normal period, January was 41 days, February was 33 days, March was 31 days and April/May was 46 days. Before BC I was 29-32 day cycle, during was 28 of course and after it's been like above. Is that normal? The weird random long cycles? I was stressed about getting pregnant the first few months but the past couple months haven't felt worried at all.