Could Lack Of Estrogen Cause Low Libido Level & Vaginal Lubrication?

Hello, I'm a 32 year-old female, 55kg and 173cm tall. I have slightly low blood pressure. I started having infrequent migraines with aura from the age of 13. As I have got older they've become even more infrequent (on average, I have been getting one every 2-3 years for the past 7 years). I took the COCP Norimin for 5 years and it seemed to be the perfect pill - absolutely no side effects, regular periods. My GP put me on Cerazette approximately 19 months ago due to my having another migraine (although it wasn't very different to previous ones, I had some MILD tingling in my left arm and hand. Imigran helps me greatly). It's really not bad, apart from the fact that my periods are a bit all over the place (if I'm very stressed, I either don't get one for about 7 weeks OR it is incredibly, scarily heavy)...and I've noticed in the past few months that my libido is MUCH lower and I have problems with vaginal lubrication. Could I be lacking in oestrogen? Is there any way I could go back onto the COCP, perhaps with a lower dose of oestrogen? Thank you.