Pressure!

19 weeks and I have placenta previa.. my baby boy sits super low and all my belly bump is low.. I have so much pressure down there and it's so uncomfortable.. I'm only 19 weeks and I know it's only going to get worse, so how can I help to make day to day more comfortable for myself? It's especially uncomfortable when sitting down. When I feel him kick or move it's more on top of my vagina and in my pelvic region versus in my actually stomach area... everything's below my underwear line. My back has started hurting too.