Right, this is not to slate SAHMs. I am one OK (for now anyway). I love my boys and i love spending time with them and taking my eldest to school, middle one to playgroup and then having time with my baby. I like being able to go to assemblies and do all the stuff that isn't necessarily always at a great time for WOHMs (although I appreciate that some will do some/all of these things too). I am not knocking the role of a SAHM! Just to be very clear. I am also not knocking WOHMs, I'm simply talking about my situation and how I feel!
I have always had a job and have had a very successful career thus far but since having children have wanted to work part-time. This has worked well for us and I've been part-time every since DS1 (now 6 was born). I didn't go back after my one year maternity leave after DS3 was born and this is because we are relocating to be reuinted as a family. My DH works away from home all week (he got a job after 9 months out of work but it's not commutable so he lives away) and the fact that he is the higher earner and I don't want to work full time means we are moving house to be near his job and it would not have been commutable back to my old job. I was also happy to leave for other reasons as well which really aren't worth going into. I do plan to go back to work once we've moved and settled our boys in but for now, I am at home all week alone with my 3 DSs. Just me and them. This is fine, it is tiring at times, but we manage ok and I don't find it as stressful as I did when my DH first started to work away back in September.
Anyway, this just gives you the background into my life before I bemoan my lot.
I am bored senseless a lot of the time. I feel deflated and I also feel guilty for feeling this way. 
I just don't know what to do with myself! Endless toddler groups, coffee mornings, painting, activities indoors and just general going to soft-play and park is not much fun to do all the time. I obviously do these things some of the time because I like to and I know I should.
There will be some happy fulfilled SAHMs certainly, but I'm not one of them. I just don't know how to fill my day. My house is clean ( it could perhaps be a little cleaner but this is also not what I want to spend my spare time doing), shopping is done, fresh food cooked every night, laundry done and folded etc..
Please somebody tell me what you do to make you happy as a SAHM and how you fill your time keeping mind I've a 17month old, a 3.5 year old and a 6 year old.
Or just tell me to stop moaning and get on with it!