At 18 i had an ovarian cyst removed, at 25 i'm having my first cervical smear,should i have had one before now?

I'm 25 and having my first cervical smear today, I'm very nervous and scared of what the results may be due to having an ovarian cyst removed at age 18 and my mum and grandma [on my mum's side] having to have abnormal cells removed, since my operation at age 18 I have not been contacted to have any more check-ups until 2 weeks prior to my 25th birthday, my mum has said I should have had my first smear test before now given my/my family history, I am worried that they may find something I have dreaded since I discovered about my ovarian cyst at 18, should I have had one before now? Any advice will be gratefully taken =~/