Vitamin D deficiency while TTC

Has anyone else had vitamin D deficiency while TTC or early pregnant? My husband and I were talking about starting TTC in May, but I was just diagnosed with a pretty significant Vitamin D deficiency and started on a high powered replacement therapy (50,000 units per dose once a week) for at least 12 weeks. I assume the maintenance dose would be fine, but I wasn’t sure with this high dose. I have a message placed with my OB and I’m waiting to hear back, but I wanted to see if anyone else had experienced this before as well. Thanks in advance!