Should i stay or should i go

This may be a bit gross but I'm concerned but don't have insurance to check it out. I normally have heavy periods. Irregular but heavy. Started at 16. After being active it kinda got better and my period normally stopped almost a day or two early. Became active at 18 Recently my period came again. And it was kinda brownish. I'm like um ok it will get heavy later in the day. Nope it stayed brownish and light that continued for two days. Then yesterday it was completely clear. That's only three days! I'm slightly worried I may be preggers or something serious. When I logged my period the little facts <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> gives told me if it's lighter then normal I should see my doctor but I don't have one. My question is ⚠️should I go to the ER?⚠️