Aw, first time mom ka pa, kaya normal yung worry mo! Honestly, ang common lang nyan after internal exam, the heaviness and tiredness, kasi minsan ang body natin ay nag-react sa pressure from the check, lalo na pag malapit na sa due date. A few of us mommies namin felt the same way after our IE at sobrang init ng pakiramdam even though walang fever, tapos super antok at gusto lang mag-rest for days. I'd say take it easy, rest as much as you can, at stay hydrated, pero since kasama na rin yung bigat na pakiramdam na yan, better mag-check in with your OB just to be sure everything's okay and walang infection or anything, especially close na kayo sa 37 weeks. You're almost there na!