Random GERD/LPR questions

I was diagnosed with GERD about 7 months ago, a few weeks ago I was diagnosed with LPR. I'm 23 and truly struggling with this life changing diagnosis. I try to follow the diet and listen to all of the rules as much possible. I've always been in shape and do not really wear tight fitting clothing so that one I don't really have to worry about.

How do I raise the top part of my bed but not the bottom?

I'm an accountant and it's tax season so I am working till 8 at night, by the time I get home and make dinner if I wait the 2-3 hours before going to sleep I'm not able to fall asleep until around 12! Is it better to not eat and just go straight to sleep? I know this is not ideal but I'm not sure what else to do and tax season is only for one more month. I do try to prepare my food before so I can just come home and eat right away but still then its like 11 before I can sleep and after working 12 hours its just impossible to stay up that late.

Working out...Is it ok to work out in the morning before eating? How long after eating should I wait to work out? Are there any exercises I should steer clear of?

Is there anything else anyone suggests? I still constantly suffer from throat pain, hoarseness, nausea, breathing issues, and headaches (not sure if the headaches are related but figured I might as well throw them in there). Because I am constantly showing symptoms it is hard to pinpoint what exactly bothers me. Any suggestions or help are greatly appreciated!