I recharged my A/C system 3 days ago and pressure needle moved from 25 to almost

Really need to see both the high side and low side. Low side should read 45-25 when compressor is running, high side should read 100-300 or so when compressor is running. So, is the compressor running when you turn on the A/C? Because it sounds like the low side is equalizing with the high side on a hot day which will tend to read about 100 psi on both.