Nesting???

26 weeks along and a first time mom here. I'm just wondering if any of you ladies are hitting that "nesting" phase like myself? I have been at it about a month now, taking on all sorts of house projects, canning food for winter, cleaning my floors on my hands and knees with a small scrub brush...etc even though I'm exhausted!! I'm so tired but laying down or resting (even after working a full day on my feet) literally gives me heart palpitations because I am so anxious about all the things not getting done! Pleasse tell me I'm not alone! Any tips for curbing it a little? I'm getting pretty burnt out but my mind still won't settle down!