If you are irregular, what did you do to TTC (besides the obvious , I understand where babies come from...at least I think I do)?

To get preggo with DD, DH and I just DTD every other night until I got PG (it took 10 months of trying...DH was secretly happy every time we had a negative test). Since DD was born, I've only had 2 cycles and they are very irregular, much worse than before. I saw my OB and she did a bunch of blood tests and said everything was fine and it was just my body settling down from all the pregnancy and nursing hormones and that things would regulate in a few months. DD is 11 months and I haven't nursed her since she was 6 months. DH and I are TTC, but only in that we don't use any form of protection. We aren't up to DTD every other night yet, and with an active 11 mo in my life, I don't really see that as a possibility this time around. Any advice or BTDT? TIA!