During pregnancy, it is important to be cautious about the medications you take. While Benadryl is generally considered safe, there are alternative remedies you can try for relieving sinus and cold symptoms. First, make sure to rest and drink plenty of fluids to stay hydrated. You can also try using a saline nasal spray or rinse to alleviate congestion. Steam inhalation with eucalyptus oil may help clear your sinuses as well. Additionally, honey and warm lemon water can soothe a sore throat. If your symptoms persist or worsen, it's best to consult with your healthcare provider for further guidance.