Hi Hoping, do not get so worried. U should try to keep stress-free.
The embryo if placed properly into the uterus should not 'fall" out. In NUH, we have bed rest for 2hrs. If need pee, usually can get a bedpan. This is to avoid getting up and down. But now they do not insist, can go toilet yourself if u want to.
I don't think sleeping sideways matters. How can we limit our sleeping position esp after we have fallen deep in sleep? If sleeping position matters, nurses and Drs would have advised
us.
Simple chores is ok. Not mop floor, squart up and down, anything that is tiring is no no.
It cannot be expected that we lie on bed for 24hrs a day. Many sistas spent their 2ww being couch potato watching tv programmes. But do try get some bed rest, that's what the mc is all about; so that we minimise stress, physical activities but get enough rest.
Don't worry so much. Keep a happy spirit and pray for success.
Good luck!