Anyone tell they are pregnant before their missed period?

Has anyone else ever been able to tell they’re pregnant before a missed period? My period is due in 3 days and all of a sudden I woke up today with that feeling… that slightly nauseous, cloudy feeling, and now im having minor hot flashes, pregnant feelings. But my last two pregnancies I didn’t realize until after I missed my period. My boyfriend and I aren’t really trying but we’re not NOT trying either and I know we definitely did the deed during my ovulation week, just not sure if it was close enough to matter. I’ll take a test when we get home from spring break at the beach but that’s still 10 days away. Just curious if anyone else can tell they’re pregnant before enough time has passed for a positive test? Or am I crazy lol I had a mscarrage at 17 weeks last summer due to being in a boating accident, so part of me may be a little wishful. My periods are super mild, and the only PMS symptoms I ever have are acne and some water retention and I haven’t noticed either of those yet so who knows.

Before I took a test, I was really emotional, feeling down and just not myself…i wasn’t expecting to see a positive test for sure but it came up right away. Thats what it felt like for me…im sorry if this isn’t helpful…

This last time my boobs got were bigger than normal & I was bloated but not like a period bloat lol hard to explain.
I was maybe 3 weeks & some days already but didn’t know till I was walking around the store with my bf and he was saying something about my boobs looking fuller & made me test that night