Anyone test opks at work??

Ok so I have bankers hours (9-5) and I have to be up 6:30am for work. By the time I hold my urine long enough after work I can only test around 6/7pm once a day. Is it weird to take opks to work and test like on lunch break? Has anyone done this and found their surge earlier rather than waiting til evening? Am I just being obsessive with this??