Not started period....

Okay so my app has kept telling me I should've started my period, like four or five times now and I have to keep pressing my period is late button... SO and I have TTC for a little under three months now. I was nauseous the first three days and now I'm just having mood swings some days, sore breasts, a little pain in lower abdomen every now and than. Do y'all think I should test?? Usually I can feel period symptoms days before it starts. TIA I'll appreciate any input