Reproductive: Claritin

Can You Take Zyrtec in the Am and Claritin D in the Evening While Pregnant?

Currently 7 weeks and and a couple days pregnant. Suffering from really bad, bad allergies. I used to take Allegra-D. Once I find out I was pregnant, I've been trying not to take anything. However, when I get really bad allergies, most of the time I develop a sinus infection. Would anyone know if I can take both in one day? Thank you.