Rahu mahadasha -ketu antardasha

I'm 22F LEO , according lagna Rahu in 9th house ( aries) , ketu with venus in 3rd house (libra) I'm unable to understand what all precautions or things goes even I'm having exam in upcoming May. I'm planning to skip nd go for September this dasha last long itself till September last . Please guide me I'm so much confused even my past person is also comeback with confession I'm on crossroads. Any guidance TYSM.