Cramping. Gas? Or false/actual labor.

Help! It started when I went to take my dog out it’s too the point I’m nauseous. I feel like I may need to poop... again. Sorry for the tmi but ugggh! It went away and I started walking further with my dog and it came back. Then it went away again and came back. Once again, in the 15 minutes I walked outside it kept happening on and off. I really didn’t get to time how long the pain would last, I’m starting to worry. I’ll try using the bathroom but if that doesnt help, how screwed am i?

Only 29 weeks!