My Last Period Start Date Was Sept. 16th. I Have

My last period start date was Sept. 16th. I have not gotten my period for Oct. (which would of been the 14th). I did have spotting when my Oct. period was due. I feel sick mostly during midday. I feel bloated and had cramps when I was suppose to get my Oct. period. My breasts are tender but not so much my nipples, which haven't changed in colour either. I took two pregnancy tests two weeks after my missed Oct. period. Could I be pregnant?

Thanks,
Susana