I think that some vets can do a blood test to look for elevated levels of estrogen/progesterone, but since a cat's pregnancy is so short, I imagine by the time you have the test back you'll know for certain by looking at her if she took.
Pregnancy calmed my wild girl down a lot-- she became much more sociable during her term.
Don't worry, if she didn't take this time, you can try again. It's not like you need to go somewhere for a stud!! Perhaps Tsekani might have bred her too early in her heat cycle.
But I have a feeling that you're like me with my first litter, and just watching her closely for any and every sign that things are going as you planned