What to do for my foot?

The doctor says that there is nothing wrong with my foot but before he said that he had said that i had sprained it. When physical therapy(PT) wasn't working i went back to the same doctor and he sent me for an MRI. After he saw my MRI this is when he said nothing was wrong. But if there was nothing wrong then why am i still in pain? On a scale from 1-10 with 10 being worse pain imaginable my foot feels like a 4.5-5. Also on my PT papers they put Achilles tendon strain. The area where my foot hurts is the Achilles tendon area and the area where a high ankle sprain would be. I've been doing R.I.C.E since when my foot first started hurting and it's not helping at all. When i first injured it i was on crutches for about 3 weeks and was doing PT for 2 of these 3 weeks. My injury happened 2.5 months ago. It hurts when i point my foot and when i bring my foot towards me. One please don't say i'm acting like a baby cause the 1-10 thing is just currently sometimes it hurts a lot worse. Secondly going back on crutches isn't an option. And three the only 2 choices my mom is really letting me have is going to another doctor or keep doing PT which isn't helping. Also if you know could you please tell me what could be wrong with my foot and how to make it better fast because i'm a level 5 gymnast and i'm trying to make it to states while a level 6 so... Thanx