Thanks for the query.
Some amount of pain abdomen and body pains etc are normal in pregnancy
But if these symptoms become severe better to consult gynecologist once and rule out the possibility of esophageal mucosal tear etc. which can occur due to vomitings.
The possibility of flu
can also be excluded in same sitting.
You didn't mention whether you had previous normal delivery or a cesarean section.
If you had previous cesarean better to be a little bit careful. Anyhow in 27 weeks the chances of uterine dehiscence etc are rare. But if associated with polyhydromnios or big baby etc., this possibility should be ruled out first.
Rare possibility of thromoembolic complications may also occur in pregnancy. So better to get examined thoroughly to rule out all these things.