Thanks for writing to us.
The cause of premature birth
in your case is likely to be PIH and not the infections for which your doctor is investigating. Even if all your reports come normal, there are chances of having a high blood pressure
again in your next pregnancy
thus causing the labor pains.
I hope this information has been both informative and helpful for you. You can consult me again directly through my profile URL http://bit.ly/Dr-Rakhi-Tayal