No reason to be embarrassed about owning a Hi-Point. Come on, it's yours isn't it? I have two and they are both excellent.
If the slide is locking back after each shot I would suspect the spring on the last round hold open lever. It could possibly be a weak recoil and/or striker spring.
Try calling Hi-Point and telling them you need to talk to a tech about a problem with your gun. They should be able to figure it out over the phone, talk you through it and send the part.
If that doesn't work or you don't feel comfortable with the disassembly process than by all means send it in. They will probably give you an extra mag for you troubles.
Good luck and enjoy!