19weeks preggy,medyo nangingimay/nangangalay na balakang

hi mga momshie ask ko lng normal lng b na minsan nangangalay ang balakang nyo during pregnany?19weeks nko and kagagaling ko lng sa bedrest,ok nman for the past week tas kahapon galing pa ako ng OB.tas kagabi medyo nangangalay n yung balakang ko.diko alam kung epekto lng b yun kc after a week ng rest kahapon lng ako lumabas and nakapaglakad-lakad ulit pero di nman bonggang lakad.hope to hear fr you guys.tnx in advance!