sick notes for pip

Hi, I am working part time and was receiving DLA for mental health conditions but have now been asked to apply for PIP. I am still working part time but finding it a struggle and am off sick all the time. Should I send in sick notes as evidence for PIP or will this go against me ? Thank you

Hi Thanks for that...can you just clarify a few points? Can I still work part time and claim PIP as you say its not an "in work" benefit? (On DLA I could still work and get PIP)
Do I have to disclose specifically that I am in work when applying for PIP? I work part time from home and work around my disabilities. Thank you

I am a little confused....You say that you are not required to inform the DWP that you are working....but then you say it can count against me if I dont inform them? I dont pay tax as I earn too little. I am on other benefits such as Working tax credit and housing benefit, so would they already know? My point is, do I specifically need to tell them that I am working on the PIP form? Sorry to repeat myself, I just dont want to get into trouble by not disclosing that I am working, but then I dont want that to mislead them into thinking that I am OK. LIke I said, I work around my disabilities and I havent worked consistently since August 2017 as I have been off sick so much.
Thank you for your patience