Hello. welcome to HCM
If your first C-section was not due to cephalo-pelvic disproportion i.e. short passage when compared to baby head size, after 5 years you are eligible to be given a trial of labour, provided your previous scar is good and the baby size is appropriate. Now whether, a normal labour can be tried is entirely the choice and decision of your obstetrician.
On the other hand, some causes which have led to previous C-section will repeat themselves second time (e.g rupture of membranes
In any case, the sole aim of your clinician will be to provide a smooth delivery. So, it is the best to discuss this issue with your doctor openly, as she is the best person to assess the pelvis and provide a suitable advice and judgement.