What are the signs of pregnancy?

Okay, are there any older mommas here, that have had tubal ligation? I’m 48, and had my tubes tied 23 years ago. I’m almost a month overdue for Mother Nature, and I’m experiencing EVERY symptom of pregnancy! Weight gain, VERY frequent urination, cravings, breast tenderness, etc. if I didn’t know better, I would swear I was pregnant! Took one test, which was negative. Having ALOT of lower back pain, swelling of hands and feet. I’m sure I’m not pregnant, I know I’m not in menopause. I’m always regular. Idk what to think! Wondering about getting a blood test to be sure. I’ve also started having some discharge from nipples. I’m so sorry if this is tmi! Just don’t know what to think!!