20 weeks

im on my 20 weeks now starting to feel backpain always on the right part buttocks part... parang may naipit na ugat.. to the point na hindi ko maigalaw ang feet ko and body konting galaw lang sobrang sakit... one time naligo ako hindi na ko makagalaw need to call my husband to carry me.. anyone here experienced it, if yes ano ginawa nyo? or is there any exercise para mawala.. napansin ko kasi 1 hour or 30minutes lang ako nakatayo or walk umaatake sya.. 😢