Problems in Bed

Don’t necessarily know what the best way to word this is. I am a 20m who has been sexually active for 3 years, never really having any problems in bed, maybe a hiccup here or there but mostly smooth sailing. Recently, I have had my medications (mood stabilizers) change, and I fear they may be affecting my sex drive. Since the medication change almost 2 months ago, I barely have any sex drive. In fact, I don’t even really get hard unless I’m hyperfocusing on it. Last month I was visiting a city, met with a girl, one thing leads to the next and- nothing. A slight erection occurs, but not at all to the full extent of what I know is capable, and this has only started since the med change. Honestly? I don’t really mind this problem. Because I have such a low sex drive, I don’t really feel like I’m missing out on much. However, I’m scared of future situations with girls I really care about and don’t want to turn anyone off because I’m essentially struggling with ED. How do I bring this up to my psychiatrist? I love the meds I’m currently on, they’ve made me the happiest I’ve been in 7+ years, so I’m hesitant switch things up. Just wanted to see if anyone had any ideas on how to handle this, and if they’ve had similar situations how they went about it. Thanks so much!