Does Stomach Heaviness, Delayed Period And Nausea Indicate Pregnancy?

My husband and I are trying to conceive and I'm due for my period in approx 10 days. I did take a pregnancy test, but realize that it is probably too early even if I am. I feel very mild cramping and aches in my abdomen. When I reach for something in the upper cabinet I feel a tighter ache on my right side of my abdomen. Extra tired and craving potato chips (which I have never done before). My belly feels heavy, and I get nauseous at times throughout the day. I have never experienced these things before even with my period coming. Are these normal sensations after conception? Is this implantation? The cramping is mild but fairly continuous for about 2 days. I was ovulating April 23-26 would this be appropriate timing?