Frustration

My LO is 13 months, and usually a good sleeper. The last 2/3 weeks she has been waking 4+ times a night crying for literally no reason, it’s almost like she’s forgotten how to self soothe. I’m 30 weeks pregnant and I’m just exhausted. She has a 30/40 min nap a day, which she has gone back to two naps now when she was doing 1 nap. Shes just started taking her first steps unaided, so I’m hoping this is a phase? Also she is super clingy and literally wants to be held all day. Anyone else going through this or been through it, how much longer have I got because my patience is running out with the lack of sleep.