Ay, medyo maaga pa yan para sa teething kaya mas likely na gum swelling lang yan, but I'd really suggest checking with your pediatrician just to be sure, basta may doubt, better safe na lang! One of my mum friends' baby had similar swelling at that age at sabi ng doctor niya normal lang, pero sa iba may iba pang reasons, kaya talaga mas better na i-confirm ng doctor mo mismo para sa peace of mind mo. In the meantime, kung nakikita mo na comfortable pa siya at walang fever, likely okay lang, pero yun na, don't wait too long na with the checkup ha.