Safe in 1st trimester?

*I will be calling my OB to confirm that these medications are safe, but am posting here to see what others have heard regarding these meds in the 1st trimester.

I’ve had a rather severe and systemic allergic reaction to something this past week that hasn’t yet gone away. I’m miserable. I’m only 8 weeks. My GP prescribed me Benadryl with Zantac at night, and Zyrtec with Zantac for the day.

What do you know about (what have your drs told you about) Zyrtec, Zantac, and Benadryl in the 1st trimester?