Woould like to be pregnant again but cycle is irregular, 27 days, 16 days, 34 days. have 1 child, stopped nursing in august. help or suggestions?

Likely fine: If you just finished nursing a baby i expect you are fertile. I would have to know if you became pregnant with your period being irregular with the other child. If the cycle is new, this may be related to lactation but you should have an exam to protect your reproductive future.

Need to find out why: See a fertility md (reproductive endocrinologist) to find out why you're irregular - 27 and 34 days can be normal and is consistent with ovulation, 16 days isn't. A one-off 16 day cycle is not too worrying. It's too long after stopping nursing for it to be related unless you are still 'comfort feeding'. Assuming you were regular before we can find out the cause and treat to help you conceive again.