Contractions at night?

Ok so I'm new to this whole labor thing but I've been having contractions in the evening and tightening sensations at night.
Yesterday I thoought it might have been the real thing so I downloaded a contraction timer app but only timed 2 before they went away.
I ate dinner, was a bit uncomfortable but fine. Then we went to bed but I couldn't lay down because my stomach just felt too.....tight?
I sat up on the computer for about an hou or two and finally went to sleep around 11:30.
The night before I woke up with contractions and diarrhea (tmi).
In the morning I am fine and can go on about my day.

WTF is going on?

Braxton Hicks. Your body is practicing.

Most likely braxton hicks. Contractions are most likely to happen at night when your body is relaxed  

Booooo Braxton Hicks lol.

Is this going to go on for weeks??

So now I'm at work and again with the tightening. It doesn't hurt but it is noticeable.
Are some BH not really there and some extreme?