Leap 4 or 5 or teething?

Ftm here and I'm not sure if my son is going through the sleep regression or started leap 5 early or if its teething that's the problem, He's 23 weeks old 24 this Friday. .did leap 5 start early or are we starting the sleep regression. A while back he was horrible would scream and fuss whenever you tried to rock him, lay him down ect. for a nap and started waking up more throughout the nigh, about every two hours or so but that didn't last too long then a few weeks later was fine at going down for naps and was back to waking 2-3 times a night (his normal) but the past week has been waking up way more often just to nurse then go back to sleep maybe 4-5 times a night but His naps other than sometimes being shorter are normal and not a problem at all or is all of this part of teething? His bottom gums look like two teeth are forming (swollen and white in what looks like the shape of two teeth looking at the front of his bottom gums)