All in my head?

Samantha
My husband and I started TTC this month. Our first try was this past Thursday.
I've been using the ovulation tests for 2 weeks, but I haven't peaked yet as per the tests. My period lasted 12 days, so I think my cycle is just off (finished nuvaring at the end of April). 
Although my tests didn't show a peak, this past Friday and Saturday my CM was clear and slippery. It also stretched between my fingers. I also had pain in my lower left side. 
Yesterday and today, I felt "off" in my stomach. Not quite nausea, but just yucky. My sense of smell has also been off for the past few days too. I feel bloated in my very lower abdomen. 
So my questions...
1. Can the ovulation tests sometimes not work?
2. Can semen change the texture of your CM?
3. Am I just overlooking things? Am I going cray cray with the thought and excitement of TTC?
Thanks for the help!

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