Should I see a doctor...

Ever since I have gotten a period it's always been irregular. I would sometimes skip a month or be a week early. It's never on time and it has never regulated. The past 6 months things seem to be getting worse, I've been having painful sex and passing big tissue like clots during my period. I've been ttc for about 14 months with no luck. What do you think it could be and should I see if my doctor can run some tests? Advice please!!