Period Like Cramps

Ke
I'm 26w 5d and I've been having cramping and back pain since last night.  My stomach is sore like I've been working out if I sit forward.  I've been gasy and ate like crap this weekend. 
 
They feel like bad period cramps. Last night I had to breathe through them momentarily, today it's just uncomfortable. I can't sit still or focus at work, but it's not like I'm groaning in pain.  They're a pretty constant cramp, not a comes and goes kind of thing for me to time.
 
I took some Tylenol and I'm drinking water. Trying to regularly get up to go to the bathroom to see if there is any gas to relieve (sometimes yes, sometimes no).
 
What should I do?  Any advice?