I think I'm pregnant/2 week wait

Can you guys tell me what made you all realize you were pregnant before you got your positive? Maybe even things you never thought would be a symptom? I've been having the usual signs, tender breasts, cramping, nausea, things like that, but I've also been having a weird warm feeling from the inside of my stomach and I'm not sure if it's related to the acid reflux/heartburn I've been having as well. Also, I haven't missed my period yet, so I cant be totally sure and it's too soon to test. Anyways, I'd really appreciate your input since most of you in this group already know you're expecting. Thank you in advance!