Leak on 90 Civic

it has about 155k miles on it i got it about 4 months ago have papers on repairs since the car has been owned A/C still works from factory about 2 months ago i bypass the heater core, as it leaked and i live in Texas, so i do not need it for the last 2 days, it has been leaking at the bottom of the radiator, it gathers coolant at the bottom pan, then flows out to the bottom plastic sheild. i have been told that if the radiator leaks, then it would be a flow, but the leak is off and on i would run it for a while (10 mins) and no leak, but then i would run it for 5 mins and a leak i run the a/c and i think that makes it leak sooner, but i know for sure when the engine gets hot, the pressure in the radiator causes the leak. The engine space is VERY little, so i can not look under the radiator unless i remove the bumper, so i can not see if any hoses are cut/leaking. i can not see any hoses where it is leaking (right side, near the belts) I come to this groups, hoping that i can find any help, as i am a student, and can not afford to go to the shops, unless i need to Thank you