Threatened miscarriage

So this morning i have been having some light cramping and with it some spotting this has never happened to me as I already have 4 kids. so I went to the emergency room where they confirmed that my lh levels are low and that i am as well a bit dehydrated the dr. suggest bed rest and no sex for 3 weeks has anyone else experience this and what did yall do to help with it im so scared i was really looking forward to this pregnancy thanks for any comments bb dust to all you ladies.🙏🏻🤰🏼 🌈 👶🏻