Ay marami talaga, mama! First trimester is super delicate kaya dapat careful tayo, avoid raw or undercooked meat, unpasteurized dairy, at high-mercury fish like bigeye tuna, plus walang heavy lifting o strenuous exercise, at of course no smoking, alcohol, or drugs. A few of us pregnant moms din iniiwasan ang certain medications at herbal supplements kaya better ask your OB kung ano exactly ang safe para sa iyo since bawat pregnancy is different. Congrats sa baby, by the way!