Uy, I haven't had a herniated disc myself, but one of my mum friends had something similar years ago at gumaling din before she got pregnant, sabi niya the key was making sure her OB knew about it kasi may special precautions siya during pregnancy like avoiding heavy lifting at certain exercises. Mas mabuti talaga na i-inform agad ang doctor mo about your disc history so they can guide you properly with safe movements at positions, especially as baby grows heavy na. Hope you're doing okay, pregnancy plus old back issues can be tricky talaga, pero marami nang nagpass through it successfully!