Should i test.

After I had my son in January I got the deposit shot. It caused some problems so I never got another shot. There for a while I wasn't having a period because of it then I started having a period twice a month(every 2 weeks) so far its been 3 1/2 weeks since my last period. I checked my cervix and its high up soft and for the most part closed off. (I can normally insert the tip of my index finger in my cervix and now I can't) it doesn't feel completely closed but compared to normally it is.