Ah the Bermuda Triangle of the 170s.
If you do a search on it, you'll find that a whole darned lot of us hit a stall in the 170s. For some reason it's the magic number for a lot of people. I have no idea why.
I hovered in the 170s for ... oh ... 5ish months? After about 2 months I quit trying to lose and just decided to spend a while maintaining for a bit. I think *for me*, I needed a bit of a break and some time for my body to regroup.
I've finally started losing again, but much more slowly.
One thing that I did notice about your post is that you said you switched to a veggie diet ... is it possible (since you're exercising and working with weights) that you're not getting enough protein to sustain/build your muscles? I would try adding more protein to your diet if you can and see if that helps. Try for 35% to 40% of your cals to come from protein and see what that does.
Good luck!!
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