I think it really depends on what the plan for the hen do was. Did they plan to go out clubbing and drinking? Or was it more of a day full of activities that you could participate in? If it was drink focused then I think it’s nice of her to offer to do something with you at a later date so you don’t feel left out if they’re all getting smashed but if it was a day you could participate in I would talk to her and say you’d still love to join in
If she really wanted u there, she would have. It's plenty time in advance for you guys to sort out you coming, but if she has uninvited you, that's her just not wanting you to go. Don't think it's about being a caring friend. I think it's just about her wanting her hen do to be perfect and thinking you might be a burden. That's my opinion anyway. Obviously, you know who she is as a person, so you're the only one who's going to really understand the reason why x
I promise around that time you wouldn't be going and you'll see it as a blessing in disguise but she should have spoken to you rather than uninviting. It's half caring half selfish which is a strange oxymoron
How close is it to your due date? What were they planning to do?
I'd be pissed at this tbh, as its not HER decision to make as to whether you feel upto it or not! I'd tell her you're a big girl, who is capable of making her own decisions!