It's hard work in the early days and the four month growth spurt is tough. I remember going to see the bf councillor because I was concerned. I promise it does pass. If naps are on track and nights are better you are certainly on the right path and are doing a wonderful job - you are tuned in to your little one's needs.
It sounds strange but after the growth spurt your body really adjusts and you don't really experience the let downs anymore. Your body sort of tunes in to your baby and works more like a tap. If you feel it is consuming you - ask to see a bf councillor for reassurance. I did that. It made me feel so much better and I felt confident and was able to trust my supply.
I would say the better night based on more frequent feedings suggest a definite growth spurt, so continue to feed regularly during the day. Just try not to feed to sleep and you will be able to slot back into routine easily.
Teeth do start around 3/4 months and it can be months before anything cuts. Is he dribbling, chewing on everything in sight, miserable, waking early from naps, red cheeks, nappy rash, loose stools, fever, slight cold? You could try applying a little teething gel about 20 mins before a fed - not just before as it can affect the latch. The sucking for a few seconds could be a comfort thing or just a sign he is tired, not hungry or just needing a cuddle. Bfing does get very quick too - so he might be extracting more milk than you think!
I always found a quick snuggle after a bath a.lovely way to engage. They sort of find their way to your breast! I took fengreek for about 6 months - I have no idea whether it really worked but it is totally safe. The colic stage/ gas should have passed now. It may give you a bit for a while though! Take 3/4 capsules a day. You can buy a great mix called more milk from expressyourselfmums website. It has a blend of fenugreek, blessed thistle and other milk making ingredients. Can't help you with the beer but I won't advise it as traces of alcohol may pass in to your milk?
if you need to talk im here hun, but you are a wonderful mum andyou are giving him a grey start. Keep it up and remember in 2 months you'll be on another.adventure with solids! The milk phase passes so fast! Xxxx