The more they engage, the more pressure it is on your pelvis, so he's probably engaging further. When Emily started engaging, the pressure was so intense I thought she was going to fall out! And I had about 4 weeks of that. Have you got a manual labour job, or a desk job? Do what you can to relax at work, or take Panadol. If it doesn't ease up after Panadol, then a call to your midwife certainly wouldn't hurt.