Severe exhaustion low oxygen at 31 weeks what to do?

I’m ftm 31 weeks and the past whole month I’ve had to sleep through the day at least 3/4 hrs in addition to at night and I’m just so drained in a very exaggerated way like totally dysfunctional. The past week it’s exacerbated a lot and I’m just yawning constantly like my body can’t get oxygenated. I can barely move around and don’t have energy to even chew food and my o2 sat won’t go higher than 93%. Also my right arm and hand are cold and numb and painfully aching all the time and just today it’s started in my right leg too. I just want to cry and I don’t even have the energy to do that. Is this bad do I go in or is this just how it’s going to be for me and my body now?

Edit- also to add I’m not healthy I have chronic pain form autoimmune illnesses and the RA rashes I get intermittently also flared up this week and I look like I have black eyes maybe form low oxygen idk I literally don’t want to exist anymore like this 😞