today's follicle scan

olivia

so after a terrible scan last week and told id have to cancel this clomid cycle due to thin lining and 4 dominant follies... i went back today and was told my lining has doubled and is now at 10mm and I have two follies and I'm going to ovulate any time now (cycle day 19 and a super positive opk) the two follies are measuring 27 and 23 ... that seems huge! is it too big? can they be too big? any opinions gladly welcome