Microbiology123

Hi there. I am involved in bioburden testing and grow fungi on SDA agar. I am required to count the fungi however sometimes the colonies grow over each other or there is just a white carpet of fungi where I can't pinpoint where the colony started or how many there are. The colonies must be grown for seven days. If any one has any advise I would be grateful. I do have some photos on my phone but can't figure out how to upload them.