my daughter was in my plevis really really low down the ENTIRE time (so low i had to have 3 different ultrasounds around 20 weeks because she wouldnt come up so we could see her lol) try not to worry to much about it, maybe bring it up to your doc at your next appointment
also the baby moves around a lot, lowering doesnt mean dropping all the time and dropping doesnt mean iminate labor....i remember i dropped like 2 or 3 months before i had my daughter then again like 2 weeks before then again a couple days before
and, you tummy grumbling soothes your baby, the noise is good, she will actualy look for that noise when she comes out