14 weeks and teething?

Hello, I have a 14 week baby boy and he is showing signs of teething (dribbling, chewing, face rubbing ect) and I am trying to help him but a lot of teething products say 5months+ so I’m not sure what I can use for this😖 we are using the Ashton and Parsons teething gel but it doesn’t come out of the tube very well so I’m not sure how much I am actually putting onto his gums😖 i occasionally give him Calpol when his temperature is really high but I’m trying to avoid doing it all the time. Is there any harm in giving him the products that say 5 months +?