Question!!

Skyla
Hello Moms, 
I just had a concern and wanted to see if any of you could give me some answers! This will be my second pregnancy and I have been cramping a bit over the last couple days. I read somewhere this was the uterus expanding and growing but it does have me a bit worried. I do not remember cramping with my first but my husband reminded me that it was over 3 1/2 years ago! Has this happened to any of you?!?