Is it working???

So I was put on provera this month (2nd time taking it) and started my period 4 days after my last pill. This month I was also prescribed Clomid (50 mg) since I do not ovulate on my own. I took it CD 5-9 and it is currently day 10 (so my last pill was last night). Is it possible to already feel side effects?? Ive had a horrible headache for 2 days now, sore breasts, mood swings, cramping (more like pinching) in my ovaries. Does this mean that the Clomid is working?! And that ovulation is coming soon?? This is our first month trying with Clomid so I don't really know what to expect. TIA!