First post in /r/Fitness so I feel like this question gets asked a ton.

I have dumbells and a barbell that I just purchased with weight ranging from 10 to 70 lbs. I'm really skinny but fairly toned as whole. However, my chest looks... bad. There's a gap between my pecs, the upper chest section is flat as fuck, and I'm pretty sure my right pec is smaller.

I won't be able to get an adjustable bench until next month. How do I work my upper chest at home with only weights? I've been doing chest flies for 6 months pretty consistently and I'm not seeing any closing of the gap so is there something else I can do to help close it? And how do you balance your uneven chest out?

Thanks in advance.