Anak, I know this is scary, pero please go to your OB or the hospital right away, okay? You need proper ultrasound monitoring and medical guidance with what you're describing, hindi pwedeng home-based lang ito.
A few of my mum friends had similar situations and ang importante talaga is getting regular check-ups kasi the doctor needs to track things closely. Breathe muna, and get professional care, your OB will know exactly what to do and what to watch for. You're not alone in this, but you need your doctor's eyes on you. Sending you strength, mama.