Uy, mama, ang chemical smell na yan during pregnancy is something you really need to check with your OB about, lalo na kung nararamdaman mo siya kahit may mask ka. Hindi ako makakasiguro kung gaano kalaki ang risk without a doctor's assessment, kaya please don't wait on this one.
A few of my mum friends na pregnant din nag-mention ng similar concerns, at bawat sitwasyon talaga ay iba-iba depending sa ano exactly ang chemical at how exposed ka. The safest move is to call your clinic or OB today, they can properly assess what you're exposed to at what precautions you need, especially ngayon ka lang sa 12 weeks pa. Praying it's nothing serious, mama!