Yes, it is entirely possible you will not get in. I don't say this to be mean but just so you have realistic expectations because applying is time-consuming and expensive. If money is not an issue, I would definitely say go for it because if you get in awesome if not you have a great back up plan and you apply again in a year. However, do not just apply to schools that don't require the GRE because your lower GPA will not stand out. I hadn't taken a math class in 5 years. I used Magoosh and scored in the 155 percentile in the math, it is not that bad. I have attached a link to an excel sheet with data on a range of schools. Good luck!
https://docs.google.com/spreadsheets/d/1EMiqkkRZruy7b84RlbdmJX8xjMQgDtFQfP1GwSbKJtQ/edit#gid=0