Hello Last Wednesday I Went In For A Scan To

Hello last Wednesday I went in for a scan to see if I was getting ready to release eggs I had two follicles on the right that where 13mm and 15 mm and one on the left that was 30.44 mm they said my lining was 8.5 this was cycle day 11 they gave me a trigger shot of Ovidrel 250 do I have a high chance of getting pregnant? And is 30.44 mm follicle a good size?