Can back pain injuries throw off your cycle?

New to this app since having my son a couple months ago, so I can't say for sure that my next period will be regular, but assuming it is..I have 16 days left until my next one. Question is, can hurting your back delay your period? Curious because I felt the total opposite of how I feel right now while in my "fertile" window last month. Obviously I'm in pain so sex is a big no, but I feel way off symptom wise :/