Husband sexually frustrated

My doctor has had me on pelvic rest for the last two months now, and my husband keeps telling me that I should pleasure him in other ways. Perhaps it's selfish of me, but I keep thinking that we should face this drought together. Why am I expected to take care of him when I'm not feeling it and when I won't be able to have that experience reciprocated?! I'm very frustrated with him for not understanding, and he is frustrated with me for not "meeting his needs." When he brings it up I just go silent now because there's really nothing to say anymore... I don't think he can see past himself in order to understand anything I'd have to say about it. What would you do?