Curious about symptoms

Hi girls! So, these last 2-3 months I've been noticing strange things. My hair is falling out a lot! I had a couple of stressful things happen to me earlier this summer, but my hair still seems to be falling out. My periods which are extremely regular have now become late by about 2 days the last couple of months and shorter! Typically my periods last 3-4 days and on the 2nd and 3rd day are moderately heavy with cramping. But as of late, they're barely anything! In fact, my August period was barely a blip on the radar! It lasted barely a day! It was pale pink and dark brown, not the normal red it usually is. I've been on birth control for years now & this particular pill for over 2 years now. And lastly, I'm starving! Like, all the time! And I have heartburn! What in the world is going on?! Is this some hormonal change? I'm overweight. Wondering if it's starting to affect my menstrual cycles now. Any ideas, suggestions or advice is much appreciated!