period

is there any way to make my period come? I'm late for the second month in a row (no, not pregnant, had 3 stick tests and 1 blood test) and it hasn't come. I've been under a LOT of stress lately that isn't going to go away any time soon, and I'm supposed to get the nexplanon implant when my period comes. any help? I just need it to come so that's one less thing I have to worry about