Irregular period- Light pink/ brown blood

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Hey y’all so I haven’t had my period for 4 months and then suddenly it came a couple days ago. ( I think I’m irregular because my period doesn’t come until every 3-4 months) Anyways this never happened to me before I would always bleed red but now I started bleeding brown blood but it was very light for 3 days then it switched to light red but I was barely bleeding at all..now it’s back to brown so I’m so confuseddd..I would see a doctor but I don’t have insurance and I’m new to the state I’m living in. My sister has PCOS and I feel like I have it as well. Because for one I never had irregular period and two they told me I have a cyst on one of my ovary but it wasn’t anything bad…that’s what they told my sister and she lost an ovary and probably might have cancer on the other…..so…idk what’s going on with my body. Every time I check with my doctor they don’t really help me and I just keep wasting my money. And google tells me I either have PCOS or it’s implantation bleeding…