Premature labour?

Shauna
Went for a growth scan yesterday at 33+5 and was shown how low the head was in my pelvis, I was told that it's unusual for the head to be so low when I'm only 33 weeks. My braxton hicks and backache are starting to get worse as well, could this mean I could go into premature labour or is it normal for them to get worse at this stage in pregnancy