Ttc, bf and regular period

I have 9months old daughter and with SO want to have another child. I was fully bf her and got soon period. My period is regular and now is the second month ttc. I heard or read somewhere that it is harder to concieve if you bf baby because of hormones. I didn't use OPK or measure BBT, we BD every other day. Last month was not "successful "... please share your experiences if you are in same boat like me now❤️