Help me understand this please!

Alison

July normal period...august through september, not normal at all....did BD the 15 and 16 of August and my original period was supposed to come I bled for a day to a day and a half and when I did it wasn't filling anymore than 2-3 tampons at most....September and October were 1 and a half to 2 days filling only 2-3 tampons with blood the entire period as well the other tampons I used were for spots of red and brown stuff and it was over....October I had a clot to start it which had lots of clear surrounding it when i wiped....do you think this could be breakthrough bleeding? do you think I could be pregnant if I have this weird bleeding around my period every month for the last 3...I'm highly nauseous today, feel weird in lower abdomen and exhausted from nothing

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