TMI? Having 2 periods 11 days apart??

Uhm so usually my cycle is 35 days or more long so I’m really not use to having it coming this early, and I don’t have affordable health care in order to get diagnosed properly. I know it’s not regular to have it in under 21 days so I’m kinda lost and concerned. Lately i’ve been having a lot of trouble losing weight. I’m 5’5 and 147lbs (my goal is 130). So, I’ve been consuming less than 1,400 calories a day but nothing’s changed. Help?? Any doctors on here that can give me a quick rundown about what I should look out for to get an idea of whether I really need medical attention?