I think I'm going crazy lol (just venting)

Lately, if someone says the slightest thing to me in an angry/agressive tone I get completely defensive or want to cry. I'm normally pretty sensitive but this last month I'm constantly on the verge of tears or easily angered. The tiniest, most insignificant things set me off. I think I'm losing my mind. I've been hoping it's a pregnancy symptom since I'm significantly late for my period. But without that BFP I don't wanna read too much into it.