I was once on nifedipine which is in the same family/class of drugs and my feet were horribly swollen. It was terrible. I complained about them but in typical fashion, my dr's PA said "put your feet up." Yes, because that works when you have stressful day job working 12+ hours a day on the regular (at a desk). When I started to have serious heart issues, the swelling from the nifedipine masked the issue a bit, because they thought the swelling was from that, and not my heart issue. Thank goodness I advocated for myself or I would be dead.
Anyway, the moral of my story isn't to scare you, but to say that if the almodipine is causing swelling, I would recommend you push back and ask for other alternatives. There are many blood pressure medications out there and they can try different combinations to control the pressure and that also minimize the side effects for you.