The pressure is urged upon you. It's the pressure, so much pressure!

圧迫 refers to a tight pressure caused by strong compression, or to the act of pressing down itself. Figuratively, it can also mean constriction, like tuition fees putting a strain on a household budget, or oppression, such as people being subjugated.

This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. The あつ turns into a small っ, and はく goes to ぱく.