11 days late then started "period" but it was not like a normal one. was having preg symptoms before. last normal period on 1/17-21. next steps?

Can do a preg. test: A urine pregnancy test done correctly gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened), 1 week after missing a regular period, or 1 week after starting an unusual-appearing (abnormal) period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and therefore lead to a repeat test.