Flaxseed, first, I'm sorry for all you have been through. As far as emotional blunting, I'd like to share my experience with you in case it helps. At least, food for thought.
When I lost my daughter, I experienced emotional blunting and I wasn't on any medication. I think it's just something that enables us to cope with everything we need to do. I think PTSD is a factor too.
I did try medication once that initial shock wore off and I understand what you mean by emotional blunting. I did feel some of that effect too.
I guess my point is, for you to consider, whether you think the emotional blunting is really the medication or a trauma response.
Don't worry about your lack of tears. We all respond differently. Not crying doesn't mean you loved your father less than anyone else. It's just a different expression. It's not wrong and there is no better or worse way to express your feelings than the rest of your family.
I know you don't feel like going through a phone consultation. It's just not the same as an easy appointment in the office. I think you need to work your way up to discussing this with your doctor though. You need to work out whether the emotional blunting is the medication or something that needs support. Not necessarily medication, but some sort of support. You also need to work with your doctor to come off medication, if that is the path you take. I know it's not easy, especially at this time, but it is worth a talk to your doctor before you make any decisions.