Tell me, it's been hurting for 4 days like during my period and lower …

Tell me, it's been hurting for 4 days like during my period and lower back. Can I take Papaverine to relieve the pain or is it not allowed at this stage? Are these training exercises? They don't catch, but it pulls on the lower abdomen and lower back. An ultrasound was done yesterday, everything was fine with the baby.