Irregular period

Okay so I’ve always had irregular periods. It’s never really bothered me. I could go 2-3 months without one or I could get 2 periods within a month but they wouldn’t last more than a few days each. The longest period I’ve ever had is 10 days since I’ve been tracking back in 2018. Well I’ve been on my period for three weeks now and it’s concerning me as it’s never been this long before. I know this isn’t normal even for me but I can’t go to my doctor because of the virus, is there anything anyone can tell me that may be of any help? Thanks