I have suffered on and off with vertigo for years, as a result of one bad case of labyrinthitis. I've been given exercises to do that help the brain adapt faster to all of the confusing signals it's receiving. Here are some you can do:
(1) while sitting, move your head side to side, then stop when looking straight forward and allow the brain to adjust to what it is seeing. Then move your head up and down (look at ceiling then down to your chin). Again stop when you are looking straight ahead. Do this a few times in a row and repeat it a couple of times per day.
(2) While standing (be careful as you are pregnant), lift one foot off the ground and balance on the other foot. When you are comfortable, do this now with your eyes closed. If things are off with your balance due to vertigo, you will find this hard to do. Switch legs that you are standing on and repeat the same as before
(3) This one is also tricky to do, so maybe have someone around to help you do it. Walk with one foot in front of the other. Not wide strides, but heal to toe. When comfortable try doing it with your eyes closed. Repeat this a few times and again try to do it a couple of time per day.
The exercises aren't fun to do, but they will help retrain the brain faster. The more you lie still, the longer the process will take. You will have to force yourself to move around regularly. (with rest in between of course). Eventually the vertigo will leave. I find that a lot of stress also exacerbates it for me, so I have to be careful to not push myself to the point of getting vertigo. I do take Gravol, if I do feel a bit light headed/spinny that doesn't seem to go.
Hi there
I have the same condition and discovered that my vertigo is an allergic reaction to a multi-vitamin supplement that is often prescribed for pregnant women - DS 24.
Hope this helps.