Hi OP i think this is unfortunately quite normal like pp have said.
It must be worrying though about your medication issue you have, hopefully that's been sorted now with the locum GP?
I found the same with first trimester, not so much that I didn't feel supported but that I just didn't have a clue what was going on or what appointments to expect or anything.
I've had loads of appointments, all have been in person except my booking appointment which was over the phone. I've had midwife appointments in a local community centre, consultant appointments, growth scans, normal scans.
The thing I've found is that my hospital have 3 different places you can go to for appointments and I never seem to have a clue where I'm going, what the appointments are for before I get there, if I need to prep in any way eg fasting for blood tests (I didn't it turns out), etc, receptionists not giving info when you check in and not knowing whether to just sit down or whether you need to go anywhere else.
I thought it was just me being an idiot but I've spoken to another couple of people that have been in the waiting rooms with me and they've all felt the same.
I'm under consultant led care but have never met the consultant - I keep having consultant appointments made but then when I get seen its never the named consultant.
However in saying all that, once I'm in the appointments everyone I've seen has been very good and the midwife I've been seeing in the community centre has been very consistent, first every 4 weeks from 16 weeks and now every 2 weeks now I'm nearing the end of my pregnancy.
I do find that you learn whats what as you go, even if you do find that you're blundering through it all a bit!