Hi Bumbly.
I can greatly sympathise with not being tasken seriously with a baby you feel is not "normal".I took dd to the gp 10 times between ages of 4-7 months.She used to gag on saliva,was incredibly unsettled,uncooordinated and dribbly.I was told that she was a baby and babies did this.
At six mohts a locum took me seriously,felt dd had reflux and px gaviscon.This did help somewhat,but she still had dribble problems and gagged on food.I also noticed she started forming her opposite hand into a fist when grasping something with her other hand iykwim.At her 9 month check I highlighted this to hv and also the fact she had only just got sitting balance and had no balance when in a standing.Told this was normal.
At this point I gave up for a bit and thought she was maybe a bit slow.She did not roll til 12 months and then in a peculiar way.She did not crawl,but at 15 months started to bumshuffle.Around this time I took her back to hv as she still had coordination problems.The hv saw nothing wrong and said they would visit 6 weeks later.
6 weeks passed and it became apparent that there was something very wrong with dd.When bottom shuffling she would hold her arms up and in front in a flappy motion.Still no crawl or stand.At this point she was referred to paeds.She has a global delay and is having physio and SALT.
The point of all this is that I felt all was not right quite early on but was not pushy enough,really.There is probably nothing wrong with your dc (I really hope this is the case),but for your own sanity,as you sound so worried,I would INSIST to Gp that you need a referral.Can you take a videoclip on your phone of any of the behaviour you think is not right???The worries sound very real to you and it is very easy to say there is nothing wrong and all babies differ,this is true but at the same time you just never know. (I had a normal birth with dd so there were no reasons to suspect a problem).
Hope you get something sorted out soon.I really hope my post has not alarmed you but it struck such a chord.Good luck,Wrinkly xx