Breastfeeding only stops conception if there is enough breastfeeding to hinder ovulation... and basically you have to be breastfeeding or lactating 24/7 .... i breastfed my 2nd child for 20 months ( she was feeding every 3-4 hours)  and fell pregnant ( without trying) when she was 18 months old.

If you have a period then it means you are most likely ovulating so now its a case of enjoying your partner :-).

I'd start taking temperature and checking for ovulation- but the best advice my doctor gave me was " it takes 9 months for your body to make a baby- so it needs at least that amount of time to recover from it- and often your body is selfprootective and wont allow you to fall so you are healthy enough to have the next one" ( although i think it needs 9 months from when you stop breastfeeding to recover lol) 

good luck