Am I psyching myself out?

We have been TTC for 8 months now. I stopped doing OPKs and all that several months ago. I never got positives and it was just frustrating me and I didn't want our TTC journey to be like that. I am now about a week and a half past my SUSPECTED ovulation date and have had significant cramping and breast pain. I can't even hardly touch them at times. I am small chested (34A) and the past couple of days I have noticed stretch marks on them and they feel very heavy. My cycles are anywhere from 30-40 days apart so I'm not exactly sure when AF is due. I'm trying not to symptom spot and get excited but it's hard!! I haven't made it to a store to get a test (I want to do it without my husband knowing so I can surprise him). I'm hoping to soon. Does his sound like pregnancy?! I know the only way to be sure is a test but I feel crazy right now!