Pregnancy symptoms while breastfeeding?

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I’m 1 day late according to one app and 4 days late according to the other. I’m refraining from wasting a pregnancy test. Did anyone else experience this?

Felt super nauseous yesterday and off and on all week.

My lower stomach by my uterus has been painfully tightening when I sneeze or cough or move a certain way

Today my nipples are so sore.

And I’ve been bloating all week!!

Please someone give me some piece of mind. The waiting game is taking forever