Irregular and TTC

New to ttc, I would say my cycle is irregular as it sometimes starts toward the middle of the month and sometimes at the end of the month. I do get one every month though. Ttc start in December with no luck, now waiting for this month. Missed a lot of days and feeling have a low chance 😞. Anyone else have similar cycle times? Not sure if that should be a concern or just if you actually miss a cycle. I do have an appointment on Friday for a possible fertility assessment just to look and make sure too!

Thanks in advance!