Hey dear.. though there is no serious effects of allergy medicines but you can consult with your doctor once.
I've been taking my allergy meds the entire pregnancy! U have to confirm with the doctor though but I'm taking singulair daily and I used to take clariten when needed with no bad effect on the baby! It is very important to control your allergies for the health of your baby! Don't stop the meds and consult with your doctor! Good luck! 👍