Hi I'm 32, I have no periods for 4 months straight, (january-april 2013)but we just had an intercourse on the last month, could I be pregnant?

Sigh - yes, you had intercourse. Yes, you could be pregnant. If you didn't have intercourse for 4 months, no, you aren't 4 months pregnant. If you had intercourse last month, yes, you could be one month pregnant.