Uy, yes normal yan! A lot of us moms noticed na kapag nag-teething ang babies, parang mas prone sila sa sipon or colds kasi ang immune system nila ay focused sa teething process, kaya medyo nakakalabas ang ibang infections, one of my mum friends noticed din yan sa kanyang daughter. Siguro na lang na hydrated ang baby mo, and monitor the sipon lang if it gets worse o may fever, pero otherwise it's just one of those coinciding things na mangyayari during teething months! Congrats sa tatlong ngipin na lumabas, exciting times ahead!