Just ordered my first OPK. I know it will probably come with instructions, but does anyone want to summarize how to use it, and give any tips/tricks about them? Thanks everyone! I'm so worried, I used to know exactly when I was ovulating, then I started taking BC and since stopping it, I haven't had my normal ovulation symptoms. I'm worried I'm not ovulating anymore... The tests will tell me, but they won't come for a few more days. So, advice on what to do once they get here?