Am I pregnant ? I'm so nervous !!

So ... I'm not sure if I'm pregnant or not or something is wrong or I am just really panorid. So my period was suppose to come on. My period usually lasts 3-4 days light to medium, but I had spotting from here to there for 5 days I had Really really light cramps just barely wasn't like my normal period cramps if that sounds right. But the spotting was brown wasn't like my normal period I'll have it Mon. Then nothing on Tuesday but I'll have it again Wednes. so I was like Okayy that's weird didn't think nothing of it , I didn't think I was pregnant or anything so when I spotted again on the 3rd time and completely ruined my brand new pretty undies I decided to make a appointment for a checkup at my Gynecologist but she will not be in until the 13th of July and I really don't like seeing a new doctor since I'm so comfortable with her 😒😒 so today my lower back was in complete pain like I was hurting bad I never had this before so I was shocked, then I had stomach pain a really sharp stabbing pain in my lower adodmen so I text my BF and he was like you might be pregnant... I really wouldn't know if I was or not I've never been pregnant or anything. What do you guys think? & would it be okay if I would take a home pregnancy test even after the spotting ? Or should I wait.