You should certainly consider claiming PIP, but do your research first. I have successfully claimed PIP this year, after claiming DLA for the previous four years. I did an unsuccessful DLA many years ago. I was ill and off work for many years and I was successful all along with Incapacity Benefit and then ESA when that replaced IB.
You don't say if you have claimed ESA, which is for inablity to work and measures different aspects of your condition. PIP is for disability and in theory at least has nothing to do with whether you can work. You can claim both ESA and PIP, as you post suggests that you were working and had to give up. Once again you need to do the research to see if are able to claim ESA.
A lot of PwME (people with ME/CFS) find it is not easy to claim PIP, having to go through mandatory reconsideration and appeal. It isn't always so however. I got PIP awarded at first attempt and I am not the only one on this forum. You will be advised to get help. For PIP my daughter helped me and did all the phone calls and form filling. I provided detailed answers for the questions. She had her own suggestions and we argued around the answers. She pointed out things I had not thought of - it was useful to have her look at my condition from outside my body. She made suggestions for things I had come to take for granted. She also wrote a long personal statement. I wrote a long personal statement. We worked to the principle that if in doubt write it down. The form went in with copious extra sheets. She also phoned and got me time extensions which allowed me more time to draft answers as I could only do short sessions. Originally my form was due back on New Years Day holiday, which was ridiculous as it would mean that I would have had to post it pretty much straight after Christmas.
To get PIP awarded you also need to be pretty bad. It is harder for us with ME than it is for people with more obviously physical conditions and also conditions that are better accepted and less stigmatised. I put in as much work as I could for the form. Essentially my life revolved around it for some weeks and my daughter put in a lot of effort too. It took me a long time to recover from doing it.
We were able to persuade them that I did need a home visit for the face to face assessment. The woman who came and did that seemed to be a decent person. I think there is something of a post code lottery and there are PwME who suffer from unfriendly assessors.
From my initial DLA claim, you will find that benefits advisers can only give you limited time and they are probably not familiar without needs. I actually I had two sessions of an hour or so to do that first DLA form. The woman who first just picked up the form, read out the questions from the form and waited for me to say what she should write. What I really wanted was someone who understood the process and could advise on how I should present my condition. In the end I had to deal with that. When I did the PIP with my daughter, we spoke on the phone and I sent her batches of text by email and she put everything together on paper for the final submission.
