late period and calorie deficit

Hi everyone, feeling a bit stressed and need some help. To start, i have decently long cycles. usually lasting 33-38 days, my longest being 42 once or twice. i started a calorie deficit, eating 1400 calories a day during the first or second week of january. i started at 137 pounds and am down to 134 but i was eating like a mad woman before i started lol. my period was due a week ago but Im currently on day 43 of my cycle and no bleeding. I started to get some cramping and breast tenderness two nights ago but that’s it. i had protected sex this month 2-3 times but checked the condom/pulled out. i’m very stressed and am wondering if it will come or should i be concerned. does anyone have any experience with this?