my home a/c is not blowing cold?

Have someone check the duct work and the freeon. If the a/c unit that you have is old, get a new one. Mine's working, but not cooling any room, other than my master bed and the kitchen. The duct work needs servicing. I will eventually get a new unit. If you have a portable fan, run it, until the a/c works again.

You've tapped into the system to obtain a pressure reading? What was the pressure? Lo side or hi side? Usually in not blowing cold and the compressor is running is lack of refrigerant but other possibilities exist. Have it professionally checked.

You need to have a spring maintenance checkup.