Need advice

So in March I had a miscarriage and since then we’ve just kind of taken our time on trying again. Well recently when having sex my boyfriend doesn’t pull out.. I’m 8 days from having my period.. but yesterday it started feeling like I’m getting a uti but today... I have spotted a little like when you’ve conceived spotting.. the past several days my back has hurt so bad and my boobs are a little sensitive.. what does this mean and should I just wait till my period to test or??