Trying to get pregnant. Missed my period for two days next day started spotting and now blood clots when I urinate. Should I be worried?

See your gyn. It's a good idea to see your gyn doctor for your concerns.
Not exactly, . But a pregnancy test is in order. If it's positive, I would recommend seeing your dr; the possibility exists that you are having a problem. Unfortunately, there is very little that can be done if you are miscarrying this early, but if you are, proper care can minimize the risk to you, & decrease the risk of difficulties getting pregnant again later.