anyone any clues

I have a really watery mouth and I'm a little bloated and I feel like I need to take deep breaths all the time and I burp like mad I I also pee a little more but I have increased my fluid intake I have the doctors next week I'm 99% sure I'm not pregnant I took a 4 month break from my pill I also haven't had sex in over 4months (since the start of October)  ive had 4 periods and ovulated I started taking my pill again 3 weeks ago and yesterday I bled a little im also bleeding today it's red and fresh blood (TMI) I'm so stressed out what's wrong with me