When to test?? HELP 😭


I've been driving myself crazy for the passed 9 months and I know everyone can relate 😟..I have 2 kids already a 9 year old daughter and my Son is 8.I used Mirena as my birth control for 8 years got it removed in May of last year and have been TTC since..no luck..I just don't understand..πŸ’”for a week or so now I've been so nauseous, headaches, appetite has been off and on.Not sure if it's stress or if I should take a test? Period is due in about 8 days according to app.I either always get my period a few days early or right on time..regular cycles..any advice is greatly appreciated..