am more than 3 months pregnant but due to some problems I have not been able to have an ultrasound yet. For about 2 weeks now, I have seen a hard lump appear in my lower abdomen. I can only feel it when I lie down and when I go to the bathroom, the hard lump gets bigger. Can you tell me what disease a pregnant woman with a hard lump in her lower abdomen is a sign of and is it dangerous?