Ay, that's a bit unusual kaya I'd really suggest checking with your OB about it, forearm pain na parang may bali pero walang actual injury isn't something I've heard from the mums in our group, at kahit common yung pregnancy aches, it's always better to rule out anything else, lalo na ganyan specific ang location. It could be hormonal changes or posture-related (especially if nag-adjust ka ng sleep position or nag-type ng matagal), pero your doctor can properly assess kung pregnancy-related lang talaga or may ibang dahilan, so don't worry, better safe than sorry, mama!