Aww mama, I feel you, ang itching talaga nakaka-inis lalo na gabi when you're trying to rest! A few of us din had similar bumps during pregnancy and honestly, it could be pregnancy-related skin changes (hormones do crazy things!) or sometimes even heat rash or a mild skin reaction na hindi obvious ang trigger. Since the Antamin didn't help and it's been a week na, I think best to follow up with your OB ulit and maybe ask for a referral to a dermatologist para ma-rule out other possibilities, sometimes they can prescribe something pregnancy-safe na mas effective. Keep us posted, mommy, and hang in there!