I feel your pain, sister. When I turned 42 this year, I got the gift of perimenopause. My formerly reliable periods now whiz between 22- and 56-day cycles. My mom is terrible at tracking changes in her body, but my sister and I have pieced together a memory of her entering menopause around 46, which I'm still processing.
Now a question for you: Have you not had a period for a year? Because blood test or not, perimenopause can involve periods of amenorrhea followed by periods and so on. My doc won't even test my hormones since he says hormone tests are unreliable in perimenopausal women.
Either way, I have good news and meh news for you: Women who go through menopause in their 40s have a significantly reduced risk of breast and endometrial cancers. BUT... we have an increased risk of cardiac issues. I didn't even realize I had them in my family, but it turns out we have a strong streak of type 2 diabetes and female cardiac issues on my mom's side. So it's super important for you and I to stay active, keep our weight down, reduce stress and eat right.
Two final things: You aren't technically in "early" menopause. "Early menopause" means before age 40 - we're plain ol' normal. You also mentioned birth control pills - I was on them for years, too. Only the high estrogen pills come with an increased risk of BC, and the risk goes away a year or so after you stop using them.