Worried!

Ok I'm a first timer and I'm 5 weeks and I don't "feel pregnant" it sounds dumb but everyone told me that I'll "just know" when I get pregnant and when I took the test I wasn't expecting a positive result at all so I was ecstatic when it was positive but with everything going on I feel like maybe I've already lost the baby.... The only symptoms I have is missed period, sore breasts, and frequent urinating.... Does anyone else not "feel pregnant?"