E*LADY - the most common side effect seem to be moodiness, vision changes, headaches and ovarian pain. However, some women have no side effects, even on high dosages.
Paula - they can also do a HSG (where they run dye through your fallopian tubes to make sure they are open) if they think the eggs aren't getting through the tubes. I'm doing a HSG if my next cycle doesn't work, before injectibles. A bonus - you have a better chance at getting pg in the 3 months after a HSG because it blows the cobwebs out
Donna - After my next cycle (150mg), we'll be doing injectibles. Sounds like you are gearing up to O, have fun bd'ing!
Trinity - your chart looks like you O'd on cd20. I haven't heard that 2 cycles in a row wont work, unless you are concerned about developing cysts. Then the bcp can help to shrink the cysts. I've heard that more than 3 cycles in a row can thin your lining and make your CM hostile. I hope your temps over the next few days give you a better idea what is going on.
Amanda - I have the vision stuff going on, spots of color and tracers. Was the test line on your OPK as dark as the control line? I'm not sure what a faint positive line means.