Both are considered safe during pregnancy. Cephalexin is 1st generation antibiotic, kumbaga mild lang. Since natapos kana nito uminom for your infection immune na ung system mo dito.
Dahil nagka asthma ka naman and need din maagapan ang irereseta na sayo ay cefuroxime which is 2nd generation medyo mataas ng konti though mas mabisa siya.
Anne