How to translate this usage of "afford" How does one translate the following sentences?

I can't afford to lose any more time.
I can't afford to lose any more sleep.

I've tried looking this up, but nothing quite matches the meaning I want to convey.
"I can't afford to" can translate directly to " 我（已（经））无法承受……"
I can't afford to lose any more time. 我无法承受损失任何更多的时间。
I can't afford to lose any more sleep. 我无法承受损失任何更多的睡眠。

adding 已 or 已经 enhances the negative tone.