Thinking of having another baby...

Kat • I am a Texan abroad with my sweet hubby and a beautiful 19 month old daughter and trying to conceive our second child.
Hi there! My daughter was born on May 5, 2015 and my husband is really ready to have another one. I am still breastfeeding every 3 hours during the day and once at night, haven't had a period, and am on progesterone birth control pills. I am wondering if anyone else has been in the same boat and conceived easily? I really don't want to quit breastfeeding to try to get pregnant again. Ideas? Advice?