You don’t have to worry about it at all.
It sounds like you have a lot of things going on.
I hope things will improve for you soon.
I respect your schedule.
I am very much looking forward to talking to you again.
When you feel ok, let’s talk again!
I don’t think there is anything rude about your reply.
It is ok to send it as it is, but I made some correction to make it sound more natural.
It might be nice to add some sentences like “I hope things will improve for you soon.” before “I respect your schedule.” to be even nicer.
It sounds like a lot of work, but take care of yourself.
–>It sounds like you have a kot of things going on. の方が自然。
When you feel calm, let’s talk!
–>When you feel ok, let’s talk again!