Should I worry??

I haven't been able to start my period on my own in a long time. Months actually. I haven't taken my medicine to start it because I started a new job. I had sex the day before yesterday and I started to lightly bleed. I thought my husband and I had just gone too hard. Well I just masturbated and went to bathroom and this was there. I don't think it's my period. Should I be worried??