I've scoured the forums and web and I thought it would be a common problem but everyone seems to have no issues converting to png. Basically whenever I convert an image I lose nearly all the resolution. I can convert it to pdf and it maintains resolution but then loses all the patterns or they're scaled weirdly. I saw a solution to fixing it was rasterising filters but it made no difference.
I'm a total nooby with this stuff and I just want to print off my document at the resolution I made it at

thanks for any help.
+EDIT+ the attached file looks exactly how I want when I see it on this website but when I open it it's all wrong again. I'm really confused.