Is Sex ok in the 1st trimester!? HELP!!?

ROSÁLIE 🇵🇦⚘ • Love being a Mommy. Prego With Baby #2 Due June 11. 2018 💖
OMG....ok so we just found out I'm about 4weeks pregnant, and my husband want to have sex but I'm scared because I feel slight pressure in my abdomen....I don't want anything to happen to the baby should we hold off until 2nd trimester when all is safe in the womb!? 😅