Advice please

So I am a RN in LTC, but work 3 hours a week as a cna in home health because I had the client before I graduated nursing school and I wanted to be nice and continue to do her, even though it was hard with working night shift. This client is young and had no physical limitations. I am more of a maid doing crazy tasks and do nothing home health related. I set up tables and lawn furniture and buy crazy items at the grocery store, never leaving on time just to get the right things. She also smokes cigarattes and medical marijuana heavily the whole time and it worsens my migraines and I leave stinking. Since I began I have been losing sleep accommodate her, even coming at strange hours when I worked days and never saying no and even asking her the day before when she wants me to come. I have chronic migraines and I have never called off but the last 2 weeks I asked if I come an hour later then I usually come. She said sure. She even told me the later the better because she sleeps all day and stays up all night. Mind you, I always bust my butt for this lady and it kind of felt like friend relationship even though she was picky. She said see you next week. Then the company calls days later and says we are cancelling you because she doesn't like the hours. She never said a word to me and I've been accommodating the hours for her all this time. We always handle stuff between us and not the company. I've never said no! She recently told me with Covid her other aides quit on her and I was the only one left. I was even doing 2 days a week and that now one might be coming Back in July. So basically she used me. I was only getting paid 33% of what I got paid at my RN job but I feel so used. So then she texts me and says she wants to call me. I never responded since Thursday. Should I respond? I am relieved that I can finally quit this job in a way because it was holding me back sleep wise and Im going back to school soon. Thanks