sex in 1st trimester

SM • 🌈 girl arrived 9.18 💕
So my DH and I had intercourse yesterday for the first time since the BFP! A little discomfort but nothing out of the ordinary. I went grocery shopping followed by a few loads of laundry and after going to the bathroom noticed some blood after wiping. I immediately freaked out and still am. I wore a panty liner overnight and nothing and light pink after wiping this morning. According to the app I'm entering my 7th week. Freaking out because this is our 🌈 baby and I just pray it's not another beginning to MC. Contacted my OB and the nurse is leaving my message with my doc. I was already scheduled for an U/S Tuesday but my other fear it's still too early to detect/hear a heartbeat. Please pray or hope well for us 😢