I get sharp headaches, spells of light-headedness and dizziness, fevers on and off?

Hiya. I’m 19 years old (female) and for 2 weeks, my systolic blood pressure has been over 135 and diastolic approximately 89 with 90+bpm at rest. (My blood pressure is normally around 110/75 with 70-80bpm at rest.) I get sharp headaches that come and go, but some don’t go for extended periods of time despite rest and sleep. Since then, when I eat I get acid reflux which temporarily disappears with alkaline foods (i.e. yoghurt) but then comes back. I get spells of light-headedness and dizziness, sometimes feeling nauseous. I’m a univeristy student and have got exams coming up; however, these are not causing me significant stress and my bp hasn’t shot up this much before. I get fevers on and off, and take paracetamol for them. Just before this started, I was feeling extremely low and took 8 25mg phenargan tablets with 2 co-dydramol tablets (500mg/10mg). The day of taking that and 3 days following, I felt like crap and was feeling the above symptoms but in a worse manner, I couldn’t even get out of bed. I’m not prescribed phenargan, so I understand I shouldn’t be using it but I did. Since then I’ve just been taking 2 or so at night every 3 days roughly. Two days after I took the load, I was having horrible acid reflux and burning pain that after talking to a doctor on the phone, he suggested that my thoughts of it being a stomach/peptic ulcer may have been correct; however, the severe symptoms of that assumed peptic ulcer went away after two days of taking ranitidine and paracetamol – I did not disclose me taking those phenargan tablets to the doctor. These problems are still persisting and I can’t approach anyone – please can you help? I’ve also been feeling very fatigued despite not being sleep deprived and as a result of my past, I haven’t spoken to a medical specialist about this but my mental health corresponds to mild-severe depression, perhaps PTSD.

‘Borderline’ anaemic, heavy periods -> take iron tablets.
Vitamin D deficient.
Used to have migraines which stopped around a year ago but blurry vision sometimes comes (perhaps a few times a month).

I am ‘borderline’ anaemic so sometimes I take iron tablets and sometimes I don’t. I’m vitamin D deficient so I take vitamin D3 tablets.