Uy, that's actually very normal at 33 weeks! Ang baby mo ay nag-eengage na, which means bumababa na siya parang paghahanda for delivery, marami sa amin nag-experience nito and napakascary talaga ang feeling lalo na first time, parang may pushing sensation. I'd still mention it to your OB sa next check-up para i-confirm na everything's on track, pero ito talaga ay sign na baby's getting ready! Ingat lang sa heavy lifting at rest when you can, okay?