Help please.

Hi my husband and I have been ttc for a 2 yrs now we have a 7 yr old. However we just recently started to actively ttc went and saw my OB and he ran labs and every thing came back normal. I haven't had regular periods since I had my daughter, I was told due to weight gain. Recently lost about 20 lbs and I have had my period 2 months in a row 3x last 6 months (unusual for me for years) my question is what should I be doing as far as TTC I am on day 3 of my cycle this month. Thank you for all the advice in advance my husband and I both appreciate it!!!!!