Hey girls! Delay in my period for 5 days. Last month was the first tim…

Hey girls! Delay in my period for 5 days. Last month was the first time after childbirth that I had my period, as usual they came, 5-6 days and stopped and there were pains in the lower abdomen, everything as usual. This month is delayed. We're using protection with my husband. What could it be? Pregnancy? Is my cycle changing? What? ? Also last month, AFTER the period ended, within 7-8 days there were some bloody discharge for 4-5 days. I don't understand what's happening. I'll go see a gynecologist soon.