help I'm new

so I've been trying for YEARS to get pregnant and nothing has seemed to work. Never have I gone this long without my period. according to the app I am 28 days late. I took a pregnancy test and I swear to god there was a faint line but my 2 friends said I'm crazy and it wouldnt be faint if I havent had my period for that long. why else would I NOT get my period though? I know I'm not crazy. I have been extremely hot and tired lately. I've been having trouble sleeping bit I havent noticed any other symptoms.