I have an irregular period I wasn't on my period for 2 months then after that I got my period very light but this has been happening for a month now?

Many things. Many things can cause this including stress, medicines, changes in weight,diet, or exercise, thyroid disease, adrenal disease, insulin resistance/ prediabetes, PCOS, and pituitary problems. Get in for a visit with a doctor, an exam and testing. Left untreated this can cause serious complications. Take care and be well.