To change/cancel plans short notice because..

[Madamolive]

i am late in pregnancy with a young child too. Should people understand my plans aren't "commitments" at the moment or should i just stop excusing myself?

Depends

Will you let people down?

Are your plans too much or are you just being a bit lazy?

depends what the plans are really

visiting family/IL's mainly, when all i want to do (sometimes) is stay in my pjs, lounge about and not plaster makeup on and keep a pernament smile on my face!

fair enough, if they want to see you, let them come to you!

I dont put a face on for family.. they see the un-made up me! pj's and all!

You are being very unreasonable. It is your fault you got pregnant and you should strive to entertain your friends.

I think that you should stop making plans for the time being.

If you are letting people down at the last minute (although it is not clear from your OP if that is the case) that's really not fair.

Especially if it's just cos you can't be arsed and not any pain / discomfort / pregnancy related thing.

Just say no. Be honest about why you're saying no. You're heavily pregnant and you just want to rest up because when the baby comes, it may be some time before you get a chance

But don't say yes and then make your excuses, that's just rude.