Watch out for any kind of fluid retention or swelling especially in your hands and face. Swelling might be touted as a very common pregnancy symptom, but this could be a sign of protein buildup in the urine which is an early warning sign of preeclampsia.
Preeclampsia is a life threatening condition which develops in the second half of pregnancy so its warning signs must be taken seriously. Always report any kind of rash or swelling to your doctor.