Talk to your doctor or pharmacist!! Don't trust your baby's health to strangers on the internet!
Hi, welcome to the forum, one should be very careful before taking any medication. As few drugs are known to cross the placenta and can have adverse effects in fetus. Pregnancy may be complicated by new-onset or preexistent allergic disease, including rhinitis, anaphylaxis, urticaria and angioedema, and atopic dermatitis. Pregnancy and asthma is extensively studied.
Of the currently available preparations, chlorpheniramine has been recommended as the first generation antihistamine of choice for use during pregnancy. Based on the information available, loratadine or cetirizine may be considered the second generation antihistamines of choice. Pseudoephedrine is a nasal decongestant which can be used for allergic rhinitis. Glucorticoids when used locally is also safe in pregnancy. You need to consult gynecologist before starting above drugs. Take care and regards.