It will sting at first then will form a lump on injection site, this lump is the heroin in your tissue and will eventually get into your blood stream so you still feel the effect. Just takes longer a lot longer.
Also, expect a huge and incriminating bruise to appear around the shoot site (like the size of your palm or bigger), as one usually gets from any intramuscular shot of any volume. So shoot in a place you can cover for 'daylife' or be ready with your excuses, children.
Just a waste of heroin.
It's just your body's reaction to not having heroin, just don't do it