Lump in throat causing panic

Hello im 16 year's old i suffer with depression and voices and axienty .For the past couple of months i have been getting this horrible lump feeling in my throat and its making me panic because i cant breath propley it also makes me feel sick and makes me want to be sick do you know what this could be? i also get hot when this happens its affecting my normal day life now and its just not going away , im on meducation for my depression and voices but there is a side affect to say it can increse axienty could this be the problem or is there something wrong

Also I dont know if this is normal or not but im always having to hide my mobile and latop under sheets because i get a fear that they will take pictures and veido's of me when im getting unchanged or doing something then i have to check my phone and latop loads of times to make sure nothing has sent to people its really starting to get on my nerve's having to do this everyday is there a problem here or am i normal?

thank you