Not sure

My husband and I have been trying to conceive & I have been taking prenatal & viatex to better our chances. My last period was in Aug. & I missed my period last month but light spotting here & there. Sometimes feel nauseated & tired. I also have a weird feeling in my lower left side of stomach occasionally like a movement of some sort. Not sure if it's a sign or just nothing at all. Any help is much appreciated. Thanks!