Light to mild period cramps but no period
I am 20 years old, and was due for my period the 17th of August. Today is the 20th. Around the 17th I experienced mild cramping and thought I was going to start my period at any moment (because its normal for me to cramp right before I start) I did late that day after using the restroom and experiencing mild cramping, wipe and have very light blood (almost looked like old blood brownish-orangish) on the paper but only that one time. I still since then experience mild- light cramping every now and then throughout the day. Mostly very early morning to mid evening time. I am actually RIGHT NOW experiencing light cramping that spikes to a mild cramp very quickly and then quickly goes back to just the uncomfortable light cramp but again NO PERIOD. I decided to Google my situation and most every source I am finding is saying things about being pregnant. I am wondering how common this is in early stages and want to hear other experiences or get advice. My husband and I have had unprotected sex for years and I have never gotten pregnant. My mother had told me about how she had a tilted Uterus and could not get pregnant with my sister and I unless she stayed elevated after. Well because I hadn't gotten pregnant, I figured I was the same. My husband and I are not trying to have a baby right now so I have never elevated after intercourse, but if it were to happen it would not be a problem. We are just going with the flow.
I was just wondering if anyone had an opinion or advice before I hurry out the door to buy expensive tests to take in the morning lol. How long should I wait?
Thank you!