I am also experiencing similar pain. I am 19 weeks pregnant and my belly button and the area right around my belly button hurt from time to time. It is sometimes constant but other days doesn't hurt much at all. I have been experiencing this for a couple weeks now.
The immune system is intricately connected to the hormonal system and the brain via messenger molecules, so that emotional stress and factors like insomnia have a great influence on its ability to function properly.
Insomnia affects people of all age groups but people in the following groups have a higher chance of acquiring insomnia. 1  Individuals older than 60. 2  History of mental health disorder including depression, etc. 3  Emotional stress. 4  Working late night shifts. 5  Traveling through different time zones.