Does it pass or do I have to break?

At 5 months my son hit sleep regression where he woke every 2 hours and would not go to sleep without a boob. Before that he would only wake around 3am to feed. Is this a phase or do I need to buckle down and sleep train him? He is almost 7 months now and we tried to do a modified Ferber last weekend but we felt maybe we didn't have enough info. So we stopped. Here's our little monster.