Do the tenses concur?

I don't know if the tenses concur in the following sentences. Could you please tell me how to say them?
Out of curiosity, can you use "concur" like in the above?

1
My left hand was under the basket in case my right hand were to get tired and drop it.
My left hand was under the basket in case my right hand got tired and dropped it.
2
He's annoying me a little too much.
He annoys me a little too much.
3
If you still are feeling/still feel bad next month on your meds, come see me.
4
We've been here longer than we were in Los Angeles.

Thank you