Maybe I was insomnia recently.

Maybe I have insomnia recently.

Insomnia is a thing/noun. You cannot "be" insomnia because it is a disease and you are not a disease. You can "own" or "have" insomnia, though.

I have not been sleeping well theses days due because of to stress from my work.

Assuming from what you are trying to say, I guessed that you have NOT been sleeping well from stress from your work. "due" means the same thing as "because of" but "because of" sounds better.

Maybe I have insomnia.

That’s why I took sleeping pills last night after supper though I thought it was not good resolve.

resolve = "solution". You can use this word instead. it may sound better.

Most people often take sleeping pills because they can’t sleeping well and without of a choice, and I think modern period has a lot of problems, for instance, it is difficult to have good relationship with anyone.

I think this world had a lot of problems recently since people started live in the earth.

I do not understand what you are trying to say in this sentence. I do not know what you mean to say.

People gave are making the bad environments bad to the earth, For instance, global warming, destroyed natural is destroying natural things and so on.

They live in on the Earth that they let the Earth would be destroyed, especially the natural things.

I think that they will stop destroy the nature on the earth, and also they should stop making the nuclear plants and atomic bombs.

I agree with you!

My hope is that people will have pretty good relationships and they will stop destroying the earth.

If anyone thinks similar to me, we should start the resolve and fix the problems we have.

I'm feeling good this morning because I slept well.

I haven't been sleeping well these days due to stresses from my work.

Maybe I have insomnia recently.

That’s why I took sleeping pills last night after supper even though I thought it was not a good solution.

Most people often take sleeping pills because they can't sleep well and don't have a choice. I think modern society has a lot of problems; for instance, it is difficult to have good relationships with anyone.

I think this world has had a lot of problems recently since people started living in it.

People do bad things to the environment such as global warming, destroying nature, and so on.

They live on the Earth but they are also letting the Earth be destroyed, especially nature.

I think that they should stop destroying nature, and also they should stop making nuclear plants and atomic bombs.

My hope is that people will have pretty good relationships and they will stop destroying the Earth.

I felt very good this morning because I slept well.

... or you could use the past tense.