Bleeding after intercourse

I feel a little uncertain at the moment . This morning I had intercourse with my boyfriend and been bleeding ever since. the midwife says not to worry because it is bright red and not a lot, so no need to panic. But I'm still unsure about the situation. So I was wondering if any of you had the same thing once and maybe cheer me up a little? I am now 16weeks and 5days pregnant of my little monkey ❤️