Hi unsure if you will be able to help. I haven't have a period in 8 month and I now believe I'm pregnant but took tests and all came back neative so I left it. Never put weigght on. Now I have white discharge coming from vagina that smells like bleach and I'm getting strong stomach pains. Been told this could be a sign of waters breaking is this true and if so what do I need to do.

What do you need to do... hmmmm... what do you need to do... How about going to the doctor?

At 8 months you would be obviously pregnant, not a doubt about it.
And at 8 months you would test positive.

No this is not water breaking,

It is most likely a infection you have allowed to get serious by not going to the doctor