hello im 29 years old white male in i would say ok to good health , bad habits smoke cigarettes ( pack a day) and use to drink soda and poor diet, since then i have started exercising and eating healthy , over the past few months it began with a Cyst near my anal hole i did see a doctor and got antibiotics and it went away but few months later under extream stress iv been feeling fatigued and not been able to keep an erection long in bed ( started few months ago) . I do drink a high amount of coffee, but also i now have what google looks like called ( brown furry tongue) i have loss of appitite and somewhat fast weight loss, but i can eat but only very small amounts of food in the day. I'm going to a FPN tomorrow but i would like a second opinion by a MD. i haven't been sick really at all during all this, but things I'm scared of that i may or may not have ( HIV, hep or STD) i have always wore a condom during sex I'm straight male and only female partners. i was tested few years back and came back clean. but haven't since then. I'm just really wondering how i keep getting things come up on me all the sudden like this brown furry tongue ( first time) I'm just curious as far as your thoughts and maybe all what should be tested for overall i fill fine but little lack in motivation and energy ( not when working out) anytime advice would be very helpful.