Hello Michelle, Welcome to HealthcareMagic Forum.
Normally we look for Diastolic Blood Pressure which is the second lower number in the Blood Pressure reading. In your case it is 87mm Hg. In non pregnant women the normal Blood pressure will be around 120/80mm Hg. During Pregnancy
the circulating Blood volume increases which increases the Blood Pressure. Speak to your Doctor, If the resting BP reading is above 140/90 mm Hg on at least two occasions within a week, and you usually have normal BP, then your Doctor will make a Diagnosis of
Wish you Good Health and Take Care.