6 months without a period

Co

I came off combined pill in December 17, (on it for 4 years).. had a normal withdrawal bleed then decided to stop taking it as wanted to try. Now it’s been 6 months and I still haven’t had a 'natural' period. Is this normal? Starting to think there is something wrong with me and that I’m having trouble ovulating/ falling pregnant? 😩 Should I make an appointment with my gp? Getting quite worried now! I’m 22 years old will be 23 next month.. any advice? x