Only latch on right side

Kristin • Married 2014👰🏼 miscarriage October 2014🌈baby boy December 2015💙 baby girl due July 2020💕
I have inverted nipples and I finally have gotten him to latch on the right but won't on the left. The left nipple does not come out as much or easy as the right. My right nipple is hurting so bad I cry.
I'm so frustrated and feel terrible I cry a lot 
Any tip, advice, tricks... Anything!!!