Hoping for baby #2


So I am wondering whether people think I'm pregnant or what to do. Were ttc #2 and have been trying for 3-4 months my period is currently 3-5days late (cycle not 100% since coming off bc). I have had heartburn almost every evening for about 1 week. Have taken 2 early response tests both negative. Has anyone been in this position or reckon I am pregnant.