Thank you for writing!
Changes in the menstrual cycle are one of the most common and earliest seen signs of perimenopause, so this is normal.
As to bladder leakage, some women do find that they have leakage during their mid and older years. According to Menopause.org
"educed levels of estrogen starting around menopause can cause thinning of the lining of the urethra, the short tube that passes urine from the bladder out of the body. The surrounding pelvic muscles also may weaken with aging, a process known as "pelvic relaxation." As a result, women at midlife and beyond are at increased risk for urinary incontinence, or the involuntary leakage of urine. The main risk factors for developing urinary incontinence are vaginal childbirth and increased age.
The most common types of urinary incontinence in women are:
Stress incontinence, which is caused by weak pelvic floor muscles. The most common symptoms are leakage of urine with coughing, laughing, sneezing, or lifting objects. Stress incontinence is common during perimenopause but typically doesn’t worsen because of menopause.
Urge incontinence (also called "overactive bladder"), which is caused by overly active or irritated bladder muscles. The most common symptom is the frequent and sudden urge to urinate, with occasional leakage of urine."