if you absolutely can't get a microscope of any kind, you should be able to tell if the trichs are at least getting cloudy from good light and a very close view, unless you just have bad vision. You may not get it exact, but just wait till the crystals look more milky than clear. Just keep in mind, 9 times out of 10 people get impatient and pull to early.
lol that sucks, well like i said it looks like almost ready to me, if you tend to your garden everyday, you'll be able to notice a real difference in the look of the buds, the leaves will be crispy kinda and even start to turn yellow and the plants will have a darker hue in general