Bowel cancer possible ?

Hi I am quite old 73 , and have an ongoing problem with my bowels.Nearly 12 months now. Had two FIT tests and both negative. My bloods are good, however i have a change in bowel habit and pain in left lower abdoman .Was to have camara up or down in March ....but because of Corvid thats all stopped. 

Am now quite worried that if it is Bowel cancer then its going to get diagnoised quite late !!!