Pelvic Girdle Pain - Advice/info please x

I’ve been getting burning pain in my back, hips and down my legs for the last couple of weeks, it’s particularly bad when driving and walking up stairs. I’ve been told it’s PGP and am waiting to see a physio. The midwife and a GP have said it’s unlikely to get better and may only worsen as I grow. I’m only 17.5 weeks so I’m anxious about how bad it could get...anyone have any good remedy’s, advice on managing it or stories of how good/bad theirs got?

Thanks! x