I have a few questions what’s earliest you can tell your pregnant like how do you know?

So my period started on the 5th of this ended on the 11 or 10th and my ovulation days started the 15th I had sex on the 19th witch was the day before my peak then I didn’t get a chance to have sex on my peak but I had sex the day after my peak. So I was just wondering how soon could I know I had a lot of cramping in my belly and bloating and I started getting the sniffles but I don’t if thoses are signs.