I don’t FEEL pregnant!

I took a test this morning, and was surprised to find it was positive!! We weren’t trying yet, but we weren’t exactly being careful either. My husband and I are both ecstatic!! I know this is clearly a positive, and I took another test later in the day that was a little lighter, but still positive. My problem is, I don’t FEEL pregnant. I’m only about 4 weeks and 2 days, but I have basically no symptoms other than constipation (TMI, but I’m always really regular) and a late period. I wouldn’t have even tested if my period hadn’t been late or if we hadn’t been “careless” about unprotected sex. Is it normal to not have any symptoms? My breast’s aren’t even sore!