Sure, I've had experiences like that. I think of it this way- PTSD doesn't thrive in a supportive environment, often, it can't even get a hold on us if we're in a safe, caring, encouraging, environment. PTSD is sometimes like a weed in an untended garden. That means, you probably aren't deeply comfortable with being cared for and between not knowing that safe feeling enough when you were younger and all the hyper-activated PTSD/fear/hypervigilance chemical reactions, it's no wonder you want something but don't feel ok getting it.