Thyroid issues????

So I'm 28 and this year idk what is happening with my body, but I've been so crazy!! I'm tired all the time, and I get good quality sleep!! I have been gaining weight like crazy, and I haven't changed anything about my diet habits to be gaining like this! My moods are sooo up and down! AND to top it off I have acne so bad! I look like I'm going through puberty!! I just don't feel like myself. This has been going on for several months now. I've never been tested, but does anyone know about thyroid issues? Do my symptoms sound like thyroid could be my problem??? 😬. PS...I'm not pregnant! Lol