Hi I've also got a dd 2 1/2.Sorry very long post.
I had a 4th degree tear which was thought to be a 3rd.The birth itself was pretty mismanaged by the student delivering me.
Mine wasn't missed but certainly wasn't well managed initially.
I wasn't told the degree of tear just midwives (student delivering and her supervisor) saying ooh we better get someone to look at that.I was stiched by the SHO in a separate room with several other people wandering in on out for bits some having a quick look at my tear.Great hey.I have since found out I should have been stiched by a consultant/senior registrar level.
Back on the ward I was handed a bowl for a quick wash down below which I was about to use then realised the woman across had just used it and it certainly hadn't been cleaned inbetween.I asked for my sheets to be changed as my blood had soaked through to be told they were only changed in the morning.
First I knew about the degree of tear was when a women's health physio came to give me some leaflets and booked me in at the consultant's perenium clinic for a few months time.
I found I had constipation from the worry of tearing the stiches after birth then got leakage around this which really scared me.Luckily as I was due to see the gynae. he picked up on this.No-one warns you so I'm not surprised you did not get picked up.It is not the sort of thing you mention at your post natal group although I now have talked in RL to friends I have found others in a similar situation with various degrees of damage.
The gynae. then referred me on to colo rectal consultant who kept saying to his students this lady who has had an episiotomy
so obviously not paying alot of attention to my notes.He was fairly dismissive but told me to follow a low fibre diet - which as I am prone to constipation and IBS wasn't the best idea.
I asked for a rectal scan as I did want to know the extent of the damage and colo-rectal guy was suddenly more serious.I was told it was actually very severe 4th degree inner/outer sphincter totally gone at the front.Colo rectal consultant then said I could have surgery but he wouldn't recommend it as I am young still and the surgery success rate isn't great.He said he has seen women with minor damage whose symptoms are severe and others (like me) who should be more severe from the amount of damage but manage OK. He referred me for colo-rectal physio like pelvic floor exercises but concentrating on the rectum.
I feel upset about the whole process and it was the women's health physio who my GP referred me too who restored my faith in the NHS.
So in answer to your question I considered going privately but didn't really see what anyone would do.They can only suggest surgery or exercises.Gynae said for underneath generally (as I still get quite alot of ache/pain from the scar) restiching generally hit and miss as often creates more scar tissue.
Also considered a hospital complaint but again didn't see what it would achieve.
My most worthwhile bit was women's health physio who gave me an ear for my problems and lots of exercises and I can get by with this.I'm still not right down below and expect I'll need some sort of surgery at some point (also have a partial prolase - rectocele) but I am much much better with a combination of the pelvic floor exercises and also time.
If I was you I'd push for lots of physio with follow up - not just printed sheet exercises.If you have rectal problems you usually get to see the top women's health physio so push for this via your GP.
I feel angry at what was an uncomplicated 2nd birth I tore so badly but like you say I know I'm not alone.I have been told I would not be able to deliver except by c-section again.
I may see a gynae who has been recommended to me in the future to see what was actually done/if anything needs to be put right but will only seek further colo-rectal advice if my problems worsen as I understand from their point of view this would entail surgery.
My advice also would be not to be embarrased as it is likely someone you know has similar problems of some degree.There is a long thread on here for women who have similar issues.