I have gone through your query and understood your concerns. The first thing I need to mention is you need to observe drooling
of saliva,urination,rolling of eyes and tongue biting to know whether it is seizure
or not. But the only thing you can rule out is by having EEG. If you were my patient I will definitely advise you about EEG. It is always better to rule out things early to prevent complications. And in case of your baby the problem may be related to improper balance while walking which usually gets corrected after proper training. Consult neurologist
for having EEG. Thank you.