Am i lookin at labor really soon.....?

i had a checkup appointment for my pregnancy..and they ended up giving me a sonogram, because they couldnt get ahold of my records from the other doctors when i was living in wyoming..but anyways on the sonogram they saw that my son has moved pretty low.. lower then what a baby should be at 32-33 weeks old... so my doctor said theres a possibility that i could be farther along meaning 35 weeks..if thats the case my due date has been wrong..or i could end up giving birth to a premature baby by a couple of weeks...today i went to go use the rest room..and when i went to push i had a huge contraction and felt my son move even lower...to where it felt like i was almost sitting on his head..if that makes any sense... and all day long i have been feeling really funny..and even after brushing my teeth i have a horrible taste in my mouth and everything i eat or drink just tastes like crap like im getting sick..is this a sign that im lookin a labor really soon???