Pregnancy question

So my ex and I got back together and have unprotected sex all the time. I was in the shot for over a yr after my first pregnancy and I miscarried. Well I am past due for my shot over a month past due and you get them every 3 months. Well yesterday and today he went in me  everytime we did it. And now I am having weird feelings and feel completely different I know it's to soon to tell but I really don't know what to think, I haven't been thinking about it just have been going on about my day as usual but it won't go away. Idk what to think. It's never happened before. The last time I was pregnant I didn't know till I was 5 months along but had every symptom you could think of and was showing but it never hit me. Advice anyone?