Safe workouts

Blythe • 34 years young. Pregnant with #1 after 11 months TTC! EDC 3/24/2018
So I love to workout, mostly running but I'm scared that if I run during my tww I won't get a BFP. Any ideas for safe workouts? I've been going for long walks but they just don't feel as good as a good run 🏃🏼 on month 5 right now and still no luck 😔