Bipolar TTC

We're TTC and I am Bipolar. For the couple months I've felt my depression progressively getting worse and now I'm at a huge low. I don't think I've felt this depressed since I my meds started to work. Because of this I've missed my last two peak windows. With me in this state of mind I am never in the mood to have sex and I'm in my fertile window what do I do? Do I make myself have sex knowing I really won't enjoy it or just ride this out even if I don't know how long this slump will last?