Hello thank you for your query. Firstly, just at 3 months, it is too early for you to have oligohydramnios ( decreased amniotic fluid ) Please have a proper detailed ultrasound as oligo this early in pregnancy could be associated with some abnormalities in the baby. Also, you need to take rest, not total bed rest, but upto 8 - 10 hours at night and 2 hours in the day. Sleep in the left lateral position. Aspirin is safe if your doctor has prescribed it. It increased blood flow to the baby. Also, take lots of fluids, atleast 4 - 5 litres per day. have a high protein diet. Lots of chicken, eggs, milk, nuts, legumes. try taking protein powder supplements and Arginine sachets with water and Alamine capsules. take care.