Weight Gain, Long Cycle Duration, Normal Thyroid. Normal?

For the past 2 years, I tend to get one cycle every 11 months of 50-55 days duration. My cycles are otherwise in the duration of 28-34 days. My GYN last time (4 months ago) said this was normal. As part of attempts to conceive I had undergone THYROID test which was normal, AMH was in normal range and so was all the BLOOD tests. Basically all tests I had undergone was normal. On a scan doc found a corpus luteum , but my GYN after an HSG informed me it is of no major concern. Previously I was on Clomid for 2 months. I have gained a little weight in the last 2-3 months and am controlling my food intake. Apart from slight work stress , TTC stress there are no stressors in life. Is this long cycle duration normal for a 31 year old?