Can you check with your ob about the cost? I recently had all those blood tests involving blooding clotting due to a miscarriage at 15 weeks and when I went she warned me it was expensive (as you said around $300) but then said "oh it doesn't matter your dr has checked the bulkbill box - so we were bulk billed for all the blood tests (15 vials!!!). Maybe if you explain it's financially difficult he may put it through bulkbilled.