Could be normal...could be PCOS....
https://www.usmomssite.com/long-lh-surge
Causes of a Long Lh Surge
Often times your health care professional will assume that having a long Lh surge is completely normal and there is no need to worry. Often times, your doctor will be right about this- it usually is normal to have a long Lh surge. The only time having a long Lh surge would not be the result of a medical condition would be in the case of having PCOS. Polycystic Ovary Syndrome (PCOS) is a hormonal disorder that affects about 6 to 10% of women today. This syndrome causes your ovaries to produce higher than normal levels of androgens, which are male hormones. This can interfere with your egg production. The eggs that the ovaries normally produce will develop into cysts, which are little sacs filled with liquid. Instead of being released during ovulation, as an egg would be, the cysts build up in the ovaries. You may want to look up some more symptoms besides just having a long Lh surge to rule this cause out.
-