Self - pleasuring accident, it burns and I have red bumps

Okay like 2 or 3 months ago I was going to masturbate and I couldn't find any lotion so I usually use conditioner and I couldn't find any regular conditioner but my cousins used horse conditioner for the head and I tried using that. well when I started doing the motions to masturbate it burned. HORRIBLY. I got red bumps all around my penis and my penis was red and swollen and every time I touched it burned bad. About a week later it's all goes away and wanted to shave my pubic hair and I did it didn't grow back as long and then i shaved it back again and it gre even shorter! I was 14 but then I turned 15 last month and my penis hasn't grew it's still like a inch or two soft but like 4 or 5 inches hard but I don't think my balls have grew ether and my pubic hair really isn't! Did this mess up puberty for me?! Do I need to go to the doctor please someone help!