Periods and pregnancy?

So we dtd on the early hours of the 20th. I started to spot a few hrs later, then later on in the day I got my period. My period stopped around the 24th I think.
And all of yesterday I've been feeling bloated and nausas for no reason. Exactly like my first pregnancy. 
This isn't a 'getting my hopes up post', I'm seriously very confused, obviously there's a chance but anyone ever had this and been pregnant? It's been 10/11 days. Too soon for a pregnancy test