Could I be pregnant?

Did anyone notice that their breasts were bigger even before you found out you were pregnant? Both my husband and I have noticed that mine are a decent size bigger. They're pretty sensitive as well and they normally aren't. I've also been really tired lately and hungry ALL THE TIME. I'm only 5dpo so I don't want to waste a test but I'm just curious if anyone else had these symptoms? Also, around when should I begin testing. I know you're supposed to wait until you miss your period but I'm way too impatient. So how many dpo do y'all test? I'm getting excited 😬