Allergy meds in first trimester?

Trina

So I get really bad allergy/sinus pains mostly when I’m sleeping. Normally, I take Zyrtec d daily, but a.) I’m out of it and b.) I’m not sure it’s safe

Is Benadryl safe to take in the first trimester? I’ll be 5 weeks on Tuesday so I haven’t seen a doctor yet. All my research has given me mixed reviews.