I think that physical exercise, (your swimming), is the best thing. It gets the endorphins going. For me, the next best is reading and/or watching movies. Letting the tears out is ok. Only I can't do that.
(((Secret)))
Talking to us is good thing.
Some kind of hand work is also a therapeutic way to spend time and let it out. Painting, knitting, sewing, clay-work, ceramics, something that you can use for a sort of art therapy would be good.
Volunteering can help use up time and you might get to meet people.
Taking a class in dance is also something I've been wanting to do.
You have a lot to deal with between your loss and the meds, so give it time, and be gentle with yourself.