Thank you for this thread OP.
I'm also celebrating sisterhood but finding being a woman very difficult lately.
Today I helped a woman take the first steps towards claiming asylum. She was a lesbian who had been correctively raped in her own country. Her story was so harrowing. She can probably never safely go back home.
I don't love being a woman today but I do feel honoured to have had that task on IWD.
Women's day is also a good opportunity to say a massive big thank you to all the brilliant, articulate women who post on here, who have taught me so much 
If we could all just unequivocally go 'yay, I love being a woman!' then feminism's work would be done. There has never been an IWD that has not been tinged with sadness, anger and difficulty for so many women. It's important, though, to occasionally stop and celebrate the gains we have made over the years and thank and appreciate each other. Because if we burn out we're no good to anybody.
I'm now going to crack open a beer, listen to and do a jigsaw.
Happy IWD everybody!