Something Just Feels Off

First month TTC. 6-7ish DPO. Woke up this morning with lower abdominal cramps that required me to wear a heating pad most of the day. I think I have had only a small handful of cramps in my entire life. 
​Had very clear, wet and slippery CM all day and then this evening it was leaking out onto my underwear and began to turn white/off white. 
​Was burping/tooting excessively the entire day and lacked much of an appetite. 
​Have felt a bit tired lately and all together just feel NOT normal.
AF expected 9/26. I know it is too soon to test but am I losing my mind or could these symptoms mean something? I'm definitely worried about the intensity of my cramps even if it turns out that I'm not pregnant this cycle. 
​What do you think?