Sleeping tips? Help.

Le
Hi ladies! I'm 20 weeks pregnant and really exhausted due to the lack of sleep and was wondering if you had any tips? I have always slept on my belly but it feels uncomfortable now. I used pillows before but now my back hurts when I use that. 
On my back I feel like I can't breathe at some point so that's also not an option anymore . So I can only sleep on my sides but oh my that hurts so much! It's not my pelvis (I think), but the bones and the skin where I lay on, at the outside of my thighs, just below my underwear. I have tried every sleeping position with or without pillows but it's only getting worse and I'm getting really frustrated and exhausted now, thinking I'm only half way makes me desperate. "Sleeping" in a sitting position is where I usually end up but that's more of a sitting with my eyes closed attempt.
Am I the only one experiencing this? Are there some tips or tricks that I don't know off? Please help. Thank you! 

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