All normal!!! I went through all of this in my 40's.... and they always send you for ultrasounds just to be sure, but this is all normal.
Here's how my doctor described it: when you're in perimenopause, it's like a plane landing at an airport. You don't just drop from 22,000 feet to the runway -- you go through a gradual descent. And when you go through the clouds, there's bound to be bumpiness from time to time... ie, irregularities in your cycle, etc. Get 'em checked out, but really, it's just a natural part of the process.
Good luck and don't worry. Happy landing, lol.