Hay, I feel for you, sciatic pain in first trimester is really tough, kasi parang walang reason pa pero sakit na agad! A few of us mums experienced it at it actually got worse as the pregnancy progressed, hindi nawala, kaya honestly you might need to prepare for the long haul pero it varies talaga per person. For work, some of my friends pushed through by sitting with a lumbar pillow and taking frequent breaks, while iba had to ask for accommodation or go on leave if it was too painful. For home stuff, pag-stretch ng glutes, warm compress, at proper sleeping position (side-lying with pillow between knees) helped a lot of us manage the pain, but I'd really suggest checking with your OB kasi they can guide you better on what's safe for your pregnancy at baka may referral pa sila sa PT. Sending you strength, mama, first trimester is enough challenge na without the pain!