So I keep reading its ok to cramp one one side just not both sides. I was nervous about cramping and realized after reading this that it is only on one side my right. Why do people say this?

UPDATE: went to the doctor yesterday everything is in good shape babies heart beat is 155 and strong even cane through over the belly with the Doppler! Which shocker the OB since I’m still kinda early 12 weeks! So she said some mild cramping is ok ! Thank you everyone!