Can pregnancy cause herpes zoster ophthalmicus to come back in my cornea? I heard stress can cause it to come back.

It can. Pregnancy can depress your immune system and allow zoster to resurface. Look out for eye pain, redness, changes in vision, or rash / vesicles. That said, if you are otherwise healthy and without HIV/AIDS, cancer, or use of steroids, pregnancy alone should not elevate your risk of shingles much more than a normal host. .