Since my last post, I was forced to leave my house and go north with my family. Since my last post, I was forced to leave my house and go north with my family.

Since my last post, I was forced to leave my house and go north with my family. Since my last post, I was forced to leave my house and go north with my family.

We hadwere having fun when the sudden news stunned everyone ion the trip. We were having fun when the sudden news stunned everyone on the trip.

We had fun when thewere having fun until sudden news stunned everyone ion the trip. We were having fun until sudden news stunned everyone on the trip.

Because the news was the reason why you stopped having fun, "until" illustrates that a little better. "when" would still work, but "until" feels stronger.

We had fun whenwere having fun until the sudden news stunned everyone ion the trip. We were having fun until the sudden news stunned everyone on the trip.

There awere bad events near our house. There were bad events near our house.

There awere bad events near our house. There were bad events near our house.

I'm guessing you're implying that the bad events are still occurring now, but because you're describing the moment you discovered the bad news, you want to use past tense here, because the discovery was in the past.

I'm absolutely terrified of the perospective (?) of returning to home. I'm absolutely terrified of the prospect (?) of returning to home.

I'm absolutely terrified of the perospective of returning to home. I'm absolutely terrified of the prospect of returning home.

Alternatively: "I'm absolutely terrified of returning home." is also fine, and more likely what you would say in conversation. "the prospect of returning home" is correct, but sounds a bit formal.

I'm absolutely terrified ofat the perospective of returning to home. I'm absolutely terrified at the prospect of returning home.

I've a significant challenge right now. I've a significant challenge right now.

“I’ve” is controversial here.

I've a signm going through a difficant challengult time right now. I'm going through a difficult time right now.

"I've a significant challenge right now" sounds awkward. We typically don't say "have a challenge". "Going through a difficult time" is a bit more natural.

I've a significant challengm going through a really hard time right now. I'm going through a really hard time right now.

Grammatically correct, but "I'm going through a very/really hard time right now" sounds more natural.