Don't dispair, KN. My friend's almost here to go running with me, but I'll write more later. I swim oh, about the same as you! You sound pretty normal to me.
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OK, I'm back. I truly understand what you mean about health care workers having strange schedules. Between work and other commitments, there are *no* training groups that I can join! I do have a friend, Jamie, who runs with me on Saturday mornings. That helps a lot. Biking I love to do on my own anyway. Swimming, well, I hate swim training. It would help tremendously if I had someone with whom to do it. If you can get in any swim training with other people, do it. Swim .9 miles? I get water up my nose. I can't breathe. My shoulders are killing me. Etc.
And yet...somehow...everytime I get through the darned swim part, and then I get to ride my bike. You will, too. Maybe "Get To The Bike" would be a good swim mantra for you and me! ;p

As for doing all three in a row--it is hard, no doubt. The energy of the group always carries me along. My problem is going out too hard when I start the bike and the run. I try to remember to respect my own pace, and stick with that. You can absolutely do this!

I think PMS is kind of like working all night--I'm not thinking too clearly then. Try to ride it out. It will pass.

Can you double check your registration, for your own peace of mind?

Maybe go for a nice ride today, enjoy yourself. Sometimes training feels like so much work, and then I'm never doing well enough. I get to remember that I really do love doing this...

Take care, L.