I missed my period I last had intercouse 25 days ago I am spotting (12 days after missed period) Am I pregant?

Maybe. One can do a pregnancy test to find out. A urine pregnancy test done correctly gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a regular period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and therefore lead to a repeat test.