as we know , we should not sleep straight on our back from 2nd trimester, so my qustion is what will we do tonight, i mean grahan k time pe sab bol rahe h sidha lete rehne k liye, jara v bodi ko band nhi kar sakte.. so can we sleep straight, on our back for 2,3 hours tonight .. or it may be can harmfull for our baby.. what should we do??