Concern or over dramatic ?

Hey guys! So I'm 23, my 1st pregnancy ended In a miscarriage last May. My husband and I have been trying since March. He has a 5 year old from before "us". Since the miscarriage I've started spotting (pin-brown) 1-2 weeks before AF, which wasn't at all common prior to the MC. I'm starting to feel like I just can't get pregnant and the one time was a 1 shot deal or maybe my body can't even handle a pregnancy. We don't chart temp or anything which doesn't help, we just "practice" ......a lot lol especially during predicted O week. Should I be concerned or stop being dramatic?!