Though I totally understand the anxiety - it's your home and probably a significant financial thing for you. The market in 2026 varies wildly depending on location, price point, and condition, so there's no universal answer, but broadly speaking you're looking at anywhere from 8-12 weeks in a decent market to 4-6 months if things are moving slower in your area. Some places shift inventory faster than others, and terraced houses can be tricky because they appeal to a specific buyer - young families, first-time buyers, investors - so you're waiting for the right person to come along, not just any person.
That said, six weeks without viewings is a different story than six weeks without offers. If you're not even getting people through the door, that suggests something about the listing itself rather than the market timeline. Is your agent doing open houses or proper marketing? Sometimes newer agents (no judgment - I'm new to this too) can be a bit passive about it. Price is often the culprit, but also listing photos, description, or just the wrong channels. I'd push your agent to actually talk you through why specific people haven't viewed it, rather than just repeating "it'll pick up." Ask them what their actual strategy is beyond passive listing management.
My honest take: give it another month or so of active effort, but use that time to figure out if something needs adjusting. Walk around your house with fresh eyes. Are the plants doing well? Kidding, but seriously - curb appeal matters. Get feedback from the viewings you do get. If nothing's shifted by week 12-13, then it's worth having a harder conversation about pricing or strategy rather than just waiting.