Confused!

I'm not sure what's going on with me! I had very light spotting for a period about 2 weeks ago. I ovulated around September 9th. I took a test on the 22 of August and the 24th, both negative. However, I have had mild cramping and felt gassy the past week-week and a half. Also, anytime I eat I feel very sick to my stomach. Should I take another test or are these not common pregnancy symptoms? I would be about 4 weeks if I was. I don't have tender breasts and my bbt has stayed around the same temp. My areola have been a little itchy and have some small bumps on them. Any ideas or advice is appreciated!