I had a hunch that I might have some kind of developmental disorder and I was right.
I was vaguely aware that I had some form of Autism and my suspicions were correct.
この場合、次のような言い方ができますよ。
ーI had a hunch that I might have some kind of developmental disorder and I was right.
「うすうす気が付いていたけど、やっぱり何かしらの発達障害があるようだ」
I had a hunch that ... で「…なことにうすうす気がついていた」と言えます。
developmental disorder で「発達障害」
ーI was vaguely aware that I had some form of Autism spectrum disorder and my suspicions were correct.
「うすうす気がついていたけど、やっぱり何らかの自閉症スペクトラム症があった」
I was vaguely aware that ... で「…にうすうす気がついていた」とも言えます。
Autism spectrum disorder で「自閉症スペクトラム症」
ご参考まで！
カナダ 
