Better crazy now than sorry you missed something and have to play catch-up later on - especially when it is your own child you're worried about.
I really don't stress too much about what other people (relatives, friends, etc) think about this type of 2e thing though - I really don't discuss it with them. When we get together with extended family we just have fun touching base and asking about what the other folks are up to, or talk about the fun things we've been up to in our own family. It's not that we're trying to hide anything - when questions come up I don't mind talking about it, especially if we have some experience that might help someone else who's not as far along in a similar journey. It's just not something that I feel like I need to talk about with family. OTOH, our family doesn't usually ask us things like "how is school going?" and they aren't the type of folks who brag about their kids being in gifted programs or great athletes or whatever, they're just more about hanging out and having fun

Re being concerned - I think most of us 2e parents here can really empathize with how it feels to be concerned when your child is really young and the things that you're worried about are also things that might still be within the normal range of development. My only regret about that time is not relying more on my mom-instinct when I asked about those vary same things and ds' teachers were so quick to reassure us that "it's completely normal". My gut feeling now (ha!) is that most of the time when a mom has one of those gut feelings that something isn't quite right - there's a reason for the feeling. I've met quite a few 2e moms who've had their suspicions confirmed - it wasn't always exactly what they suspected but it was *something* - and honestly, I've never met a mom who was questioning at that stage who had a child who was typically developing. I'm a very small statistically insignificant sample, so my stats really mean nothing, but I'm just sayin' - that gut instinct is most likely there for a reason. You might find out it was nothing - which will be great. If you find out it wasn't nothing, you'll be very glad you didn't worry about other people thinking you were turbo-parenting.
Hope you have a Happy Thanksgiving!
polarbear