I found a penny with p mint mark with blank zinc on the back of the coin and little imprint on the back . the front is copper base with the date mint mark and words " liberty" and " In God We Trust
You need pictures. There were no P mint mark Cents in 2014. This year, 2017 is the first year they ever used the P mint mark on the US Cent. The rest of your description sounds like PSD - Post Strike Damage