My usual appointment is fortnightly too, but I have had a gap of a month, and then a couple of 3 week gaps within the past few months. I don't really mind days and times not being consistent as I know she has others who need her more, but the varying gaps of weeks is definitely frustrating.

I sympathize with you feeling disconnected and like you do not matter - 3+ months is a long time, and it's hard to imagine that your T couldn't guarantee you a slot. It sure feels like T prioritized others over you consistently.

My younger brother had an irregular slot, which often meant going a month to 6 weeks without an appointment, and that was difficult.

Do you think you can bring up the gap in sessions the next time you see your T?