19weeks, bleeding after intercourse 😭

Please y'all tell me this is normal, it's my first pregnancy had intercourse about 3hrs back, noticed I was bleeding afterwards... At first twas light pink, then later some kinda regular blood color.. It's not heavy like pouring blood, but it's there...Scared to death, hubby is so positive saying not to worry he's read it's normal. I wore a pant liner, it filled up but slowly... Just changed it to another. Hope the bleeding would stop? I'm scared😭😭😭