filters with OPAMPs

When I increase the gain to get the readings I want from the strain gauge the signal is too varied. Even when I use code to smooth the signal.

So, I was thinking using a filter before the amplification might help a lot. Also, moving my circuit off a breadboard onto a PCB as well.

The reason I thought high pass filter was because the OPAMP (as i understand it) works best when the frequency is higher rather than lower.