Struggling with Loss, Work, and Medication - Need Advice

I feel like I'm losing my mind more each day. This month marks 2 years since my mom passed away, the 12th of this month is her birthday. On top of it, I'm the only female at work, and I feel like I get treated differently then the guys by one manager. I feel like I can't even express myself without making people think I'm arguing or being ignored. I take lithium and I feel like it's not doing its job. I'm also supposed to take geodon, but I haven't been because I was tired the first three times I took it, and I hardly eat since I'm supposed to eat when taking it. There are days I want to throw my hands up, and tell the world and everyone in it that I give up and I'm done. I just don't know what to do anymore. I don't know who to talk to besides my therapist, but I just started that again.