My period has arrived after 18 days late:( any info on my new cycle

Well onto next month any advice on how I should go by my cycles  
​Oct 35 day cycle af 26th oct 13 
​no af nov  
​42 day cycle dec got af 6th dec 13
​And today is cd55 with spotting for 3 days till full af now 
​Where do I begin I always had a 30 day cycle until oct any advice please and thanks baby dust to all x