New cramping?

I've had my Mirena for a little over 4 years now. At the 4 years mark, I started spotting, I haven't bled or spotted (other than after "rough sex") since the 6 months mark with my iud. This is the second month I've noticed some noticeable cramping on my right. Prior to having kids and after, the only PMS symptoms I had were my mood swings (crying over the littlest things), no cramps. Is this normal? I know i should reach out to my OB/Gyn but she's out of town and I'm wondering if anyone else has experienced this so I wouldn't necessarily need to see my OB/Gyn and pay for a visit for her to say it's normal and nothing to worry about. Also, I've never been able to feel my strings to check if they're still in place.