Period changed

Has anyone period ever change? Like frequency and length? I used to get mine every 25 to 26 days and it only lasted 4 days. Now most recently, I skipped a month and now when it comes on I’m lasting 5 to 6 days. The first three days are light spotting( not even soaking a pad or tampon) and around the 4th day,where I should be ending my cycle, it’s damn near a murder scene. And I end up with these excruciating headaches. I’m going to bring this up at my gyn appt next week but I was curious to know if anyone has had similar experiences like this.