Ovulatuon testing

I bought clearblue advanced digital ovulatuon tests on my lunch yesterday and took one while on lunch and it was just the circle! I onle had 1 hour pee when I took this. So today I held my pee from 730am to 1230pm and recieved a sold smiley face!!! WTH!!! Was yesterday's test just false because I didnt have enough LH in my pee? Or is todays test false? I don't know what to think because this is my first time ever trying ovulation tests and it's only the second test I've taken in a row and it says I'm at my peak but I don't have egg white CM. I am so confused.