Wait, this isn't your first baby?
So you have placenta previa and you're supposed to be resting but you have older children to take care of solo for 6 days while your husband is working away, and then the day he gets back your PIL and potentially BIL are all descending on you for the weekend?
Have I got that right?
Yeah, that'd be a hard no from me, but on the basis that it sounds like it's too late for that, it's definitely list of jobs time.
Do nothing while your husband is away. Absolutely nothing.
He washes and dries their bedsheets before he goes, and leaves the clean linen folded on their beds.
Text him two days before he's due back, tell him there's no food in the house and ask him to do an online shop before he gets back to make sure that there is enough for you all to eat, including whatever "foodie" stuff he plans to make for his parents over the weekend.
When they arrive, go to the door to greet them.
"So glad you're here to help, it's been hell with DH away for the whole week when I'm on doctor's orders to rest. MIL, can you please put the sheets on the beds? Oh and it might be a little dusty in there so if you wouldn't mind running the hoover around quickly first, that would be fab. FIL, DC1 really wants you to play Lego, and BIL, you drew the short straw, DC2 wants to play Barbies. DH will let you know if he needs help with anything else. Right, I'm off to bed now, doctor's orders! See you at lunch!"