Sex in first trimester

I'm 7 weeks and my husband and I finally got intimate for the first time over the weekend because I've had 24/7 morning sickness. The strange thing is the following morning I went to use the bathroom and I didn't have any bleeding but it reminded me of when you lose your mucus plug in your last trimester (sorry for the tmi) it was a lot and I'm just wondering is that normal? Thanks in advance!