This is what you need to do , wait for a less congested mempool  or accelerate your fee using the tools mentioned by almost everyone that commented on this thread , the most popular of all is  ViaBTC. However, if you still feel like waiting  then it might be a lengthy  once and this will be determined by the magnitude of your compared to the minimum  fee required , could be days, weeks or  even months, it's now left to your decision