Pregnancy after a miscarriage

My AF was due to arrive on the 11th. I'm now three days late and scared to test.

I will be very excited if i am pregnant but i had a miscarriage in May and wondering maybe that's why my period is late?

My period came right on time in June and July with my normal period symptoms, lower back pain and gas.

Since yesterday I have been feeling nauseous randomly throughout the day, very sore boobs (which happened with both my past pregnancies) and gassy. But I'm wondering if my period is just out of wack because of the miscarriage??

I'd really love to hear your opinions. Thanks in advance 💖