Clomid, should I take 100mg or stick with 50mg

So I skipped one cycle of clomid, I had taken it for 3 cycles in a row so I wanted a break. But I had my prescription filled last month even though I didn't take it and now this month has been filled. My prescription is 50mg, so now I have two month worth. I'm wondering if I should just stick with the 50mg or should I take both making ot 100mg for 5 days? AF just started today. I have pcos and don't ovulate on my own. What do you all think?