hello,
i understand the overthinking part - we've all been there.
however, at USCIS they're looking for proof of an authentic relationship so I wouldn't worry too much (including the amount of evidence, they probably get this from every petition).
also, I've noticed that a lot of cases have different timelines, some are faster, others are slower.
it took us almost 14 months to get the NOA2, but other couples was less than 1 year.
best of luck to you and remember that being patient is key