Trying to conceive with irregular cycle

I had a medical termination about 2 months ago(personal reasons please no judgement) this is my second cycle since and both have been irregular last one lasted only 5 days and this one 4.. 
​They always went for 6 days. 
​We are currently trying to conceive and I'm worried I won't be able to fall pregnant again, we tried all last month but sadly AF came.. Does anyone have any info!? 

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