Thanks for your query.
1) check your BP, get evaluated and find out if this pedal edema
is physiological or pathological.
2)It could be PRETERM LABOUR PAINS, get a per-vaginal examintaion done.
3)Vomitting could be related symptom
I hope this information has been both informative and helpful for you. In case of any doubt, I will be available for follow ups.
Wish you good health.
You can consult me again directly through my profile