Is it common? Uncommon?

I’m on Lamotrigine to help with my mood swings 
I just started 100 mg on Friday and I’ve been having suicidal thoughts. I can’t remember if they started when I started taking 100 mg, or right before, but either way these thoughts haven’t gone away and if anything it’s led to me thinking of how to do it. 

I can’t tell if it’s my current life situation (dealing with an infestation and fearing it’ll never go away + other stuff) or if it’s the medication - I think it might be the medication because I had hope that things will get better but now lately I feel empty and helpless 

In general it hasn’t helped with my mood swings but I heard it can take a while for it to work 


Some background:
my psychiatrist says I might be bipolar but my therapist says BPD - still need confirmation with psychiatrist but I won’t see her until like in 2 weeks while I see my therapist every week.