Should I move on and how?

my ex girlfriend and I were recently talking about getting back together. she would only text me but would not see me and made excuses of why she couldn't hang out. she recently went cold, I was acting needy as I was really confused, when we broke up she said she was pregnant then when we were talking about getting back to she said she miscarried. She hasn't messaged me in over a week, I sent a message saying hi three days ago with no response so I haven't texted her again. should I keep no contact?
Should I move on and how?
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