Someone help me please!!!!

Caroline • engaged to the love of my life. We've been together for 10 years, baby number #1 on the way, due 25th August 2016 ❣❣❣
Hi, I finished my period on Saturday 31st October ( 4 days ago) I took an ovulation test yesterday and it was two very bright clear lines which means high lh surge then I took another test today and there's only a faint second line appeared so now I'm not sure what's going on! Can't anyone give me help or advice? I don't want to miss my fertile week so any help would be appreciated.
Last nights test-very clear=ovulating
Then today's test-faint line which means negative for ovulation...