Late period

Hi ladies!

So I just had my fourth baby three months ago. Had about four weeks of postpartum bleeding and cramps. I felt like a normal cycle time passed and then I had a five day period. Not super heavy but not just spotting. So going off of that first period following baby, my app is saying I am currently 14 days late(for second period after baby). :( at first I wasn’t concerned because around the time my period was supposed to start I had the cramping, headaches and crankiness that goes along with it’s arrival. But nothing!

Hubby and I have been very careful as we really think this baby is our little caboose but I haven’t talked him into getting fixed yet. We did have sex around my “predicted” ovulation time. Should I be worried or could it be my cycle isn’t back on track yet? I know by baby number four I should have this down but I’m nervous cause I am not ready for baby number five lol and last time I did take the pill that was safe to take while nursing but it made me so bitchy 😞