Hi hun, welcome to BB Congratulations on your pregnancy, I hope it all goes really well for you!
Unfortunately I don't know much about any risk that might be present while wearing a sling with a medical condition such as yours, but I just wanted to say that I have a Bubba Moe sling and I ADORE it It's very comfy, even with a heffalump in it (my bub is now 11kgs!), but it does tend to give me a bit of an ache in my shoulder if I wear it for longer periods of time, so that might be something to think about if you're used to spending hours out and about without a pram/stroller handy to relieve you at times.

All the best, I hope some of the other ladies with a bit more knowledge will be along soon to give you some advice, they're a very wise bunch of ladies so hopefully someone around here can help you out Good luck!