Considering you are an average adult,you are under therapeutic doses of Vitamin D (age 9-70 RDA dose- 600 IU - Tolerable maximum uptake-4000IU).How ever daily whole body sun exposure for 30 mins synthesizes Vit-D through skin,10,000(25mg=1000IU)-20,000 IU,by UVB or tanning beds.
RDA approval is adults 600 IU/day (15 μg/day),(1μg=40 IU) by supplement medication without any harm.Mushrooms,portabella,shiitake (that are exposed to UV light), Alfaalfa, Lichens, Catfish,salmons, eels, tuna,sardines also contain few amounts that provide natural sources for Vit D.
The main symptoms of vitamin D overdose are those of hypercalcemia: anorexia, nausea, and vomiting can occur, frequently followed by polyuria, polydipsia, weakness, insomnia, nervousness, pruritus, and, ultimately, renal failure. Proteinuria, urinary casts, azotemia, and metastatic calcification (especially in the kidneys)
On something like this, I would personally call the ob/gyn just to clarify. Best wishes.