I don't think it's bad to ask for extra sessions if you need it. It's a sign that you know what you need and I think your T will appreciate that. Hope your extra session goes well!

I normally see my T once a week, but I called to squeeze in another appointment tomorrow. Like you, it's not an emergency, but I feel that it is probably better to check in with her sooner rather than later. In the past when I've done that (it has only happened a couple of times), she's always been really supportive. Hope it also goes well for you!