Ay alam ko yan feeling, sobrang uncomfortable talaga! Kaya para sigurado, better check with your OB agad kasi ang itching outside ay pwedeng maraming reasons, sometimes it's just hormonal changes from pregnancy, pero pwede ring candida or skin irritation na kailangan ng proper treatment, especially ngayon na pregnant ka pa. One of my mum friends had the same thing around first trimester and turned out it was a yeast infection na kailangan ng safe antifungal, so hindi worth ang DIY remedies, your doctor lang ang makakatulong ng tama para safe sa baby.