Could be too early to feel ang movements ni baby. Kusa pong nawawala ang ibang pregnancy symptoms like nausea pagdating ng 2nd trimester. If healthy pregnancy naman po and ok ang position ng placenta, safe din naman po mag-sex. Talk to your ob po about safe sex position and practices during pregnancy. If you're really worried po talaga, go to your ob, although syempre nile-lessen nila ang paglabas labas mo kasi high risk. Normal naman pong magworry about your baby, especially kung 1st time and di nyo pa po alam what to expect.