Increased cycle after the pill

Wanting to know if anyone else has recently come off the contraceptive pill and noticed each cycle is longer and longer? 
I stopped taking the pill in June and since then I have had a 5 week cycle, then 6 week  and I'm now over the 6 week cycle by 2 days. Each time it's late I'll wait a few days and then take a test but they're always negative. It's frustrating as were TTC and I have no idea what's going on inside. Each time "I'm late" I think I could be pregnant but then .... I'm not. 
Wonder if anyone else has been in a similar situation? 

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