Breastfeeding and trying to concieve

So im a first time mom of a 10 month old baby boy and me and my husband decided once he hits 6 months we would start trying for baby #2 but so far nothing and my periods are all over the place so it's hard for me to track when im ovulating so im starting to get frustrated with my body. I thought the 2nd time around would be easier since my body already got pregnant. I talked to my dr and she said breastfeeding is making it harder for me to get pregnant but i dont plan on stopping until around 2. Has any other mommies gotten pregnant while breastfeeding and how did u do it? Should i try to take something to help me get pregnant? Help please