Off birth control when should I expect a period

So I’ve been on birth control since I was 14. I am now 28 years old and December 31st i finished out my last pack of pills (I was on the estrogen-progestin) It’s been approx 21 days since I got off my bc pack and I have no signs of my period. My husband and I have been sexually active and we do not use protection. I do not “feel” pregnant or any different, I feel like my period is no where close to coming.

Question is, how long does it take for your period to be “normal” or show up after discontinuing birth control?