Mild febrile seizure...? Has this happened to anyone else's toddler?

In May, my 18 month old had his first febrile seizure, and it absolutely scarred me, even though thankfully these are known to be harmless. He had an ear infection and they gave him antibiotics. But then he had another one in June, most likely because of some shots he got a few days before. It wasn't as bad, but still sad to see. We took him to the er and they ran tests, did x-rays, etc and nothing came back abnormal. Then yesterday he felt hot to the touch on and off all day, but I couldn't quite catch a temperature with the thermometer... but then last night he sat on the floor and looked kind of spaced out, and seemed like he was drunk or something for a second. Then I sat him on my lap and he seemed alittle bit limp, but not completely. I took his temperature and it was 102.9, and I immediately gave him Motrin and it eventually came down. But there was one point shortly before the Motrin where my husband held him and my hubby said he had a few jerky movements, kind of like muscle spasms. And he still seemed spacey. But then sure enough a few minutes later he was his old self, running around and screaming and goofing off. Could this have been a mild febrile seizure? And do you think I should have him seen a third time for it? I checked him throughout the night, and his last dose of motrin was at 1:30am, and he still doesn't have another fever at 9:30am, right now. He is however getting four teeth at the same time. Could this have caused the high fever? Has anyone else had an experience like this? Thank you for reading all of this :)