Like the others said, try not to beat yourself up. It's so hard to tell when it's serious and when it's just one of those things.

If it makes you feel any better, here's my entries for the same award...

DD at almost 2 had a nasty cold. She had been up multiple times over the past few nights coughing and moaning and generally being miserable. One night she woke up howling and sobbing and was sort of hyperventilating. I was getting quite frustrated with her and just going "look, I know you feel yucky, but stop the silly breathing, you're just getting yourself all worked up" (in my defense, she can be a bit of a drama queen). She went back to sleep eventually and woke again in the morning crying, snotty and doing the melodramatic breathing thing again. I tried to calm her down but she wouldn't have a bar of me, so I plonked her in front of the TV hoping she'd zone out and calm down. And she did... stopped crying and stared at the telly... but when I looked over her shoulders were still heaving. Went over and lifted up her shirt and her little lungs were sucking in and out and it finally hit me... SHE CAN'T BREATHE! Rushed her to emergency where the triage nurse took one look at her and buzzed us straight through. Poor love was having (her first) asthma attack. I felt TERRIBLE. i've not missed the warning signs of an attack since though, and if anything tend to overreact as a result.

Entry 2: I was PG with DS and my back was killing me. I kept telling DD I couldn't pick her up because my back was too sore. DD then said one morning that she had a sore back. What did I think? "Sure. Mummy needs sunglasses, so DD needs sunglasses. Mummy wears her jeans so DD wants her jeans on too. Mummy has a sore back... well it's a strange thing to imitate, but whatever, I'll play... sure DD, you have a sore back too". it was only when I put her in the bath that night I noticed that she had 2 huge spider bites on her back. MUMMY FAIL!!

So you're not the only one Hun.

Huuuge hugs to you and your precious little one. Hope she's 100% very soon.