I'm a FTM and my lo has been doing pretty well sleeping. He's been waking once a night for a feed for a while which has been fine (totally manageable). He didn't really have the 4 month sleep regression, I've been putting him down awake for bed and naps since he was very young. He does have a dummy but only to initially fall asleep and most of the time he spits it out and falls asleep without it.
For the last 10 days he's been waking about 3 times a night (approx 12.00, 1.00 and 4.00). The first wake up i can usually settle pretty quick but the two others he won't settle again until I've fed him (he's breastfed). I really don't think he's hungry because I feed him plenty in the day plus he has 3 (small) meals a day. Myself and my husband have both tried settling him without a feed but nothing works.
I'm so tired because I struggle to get back to sleep after waking, it usually takes me an hour but last night I never managed to get back to sleep after the 4am wake up and I now have to get up for work 
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Day time is fine - he takes two naps, 1.25 hrs in the morn and 2hrs in the afternoon. I've noticed on the baby monitor that he's tossing and turning in his sleep a lot and he occasionally will cry out in his sleep too. Is this just a sleep regression or it it something more? I just want to know if I need to change anything or if it's something that will pass.