Kinda new here, I've had my beer in the primary fermenter for 2 weeks as of 3-17. I've only made beer 3 or 4 times before, but have always bottled around 2 weeks. But I still see a bubble in the air lock every 15 seconds or so. Shouldn't it be done by now? Should I take a hydrometer reading or just let it be? If it helps, I'm making a Belgian White Beer. Thanks in advance.