1. I'm scared that...
2. I can't help thinking that... (use this for thoughts that you try to avoid, but they keep coming into your mind)
3. It's been keeping me up at night. (use this when you're so worried about something that you can't sleep)
4. What if... ?
5. Whew!
6. Thank goodness!
7. What a relief!
8. You had me worried for a moment.
9. You have no idea what a relief it is.
10. That's a huge load off my mind.

Fact
There is a certain type of Hawk Moth caterpillar from Brazil that inflates its thorax, which makes its head look like a head of a snake when it feels it is in danger or alarmed      .. More >>